On this page
UnderstandWhat it is, what people ask, how far this page goes
Natural inorganic gem materials · Mineral species · Natural identity; treatment status unknown
Jade
A general term for jade materials that can cover Fei Cui (Jadeite Jade), Nephrite and others; when used, it must be pinned down to the specific material and treatment status. This page compares how the major standards and institutions name it, what must be disclosed when selling it, whether it can be worn every day, how it is treated and identified, and which source each conclusion comes from.
Price, rarity and origin are outside the scope of this wiki.
Questions people ask about Jade
Every sentence below is followed by the registered fact it rests on; answers add no new facts and promise no outcome.
Q1How can you tell real jade from a look-alike?
Not by name or looks: jade is an umbrella word spanning several distinct materials, and the name or appearance alone cannot determine mineral identity, naturalness, treatment or origin.GIA Jade DescriptionThe word jade has at times been wrongly applied to various gems and ornamental materials that resemble it.GIA Jade DescriptionBecause jade is a mixed aggregate, laboratories combine appearance, standard gemmological tests, chemistry and spectroscopy rather than relying on one method.LMHC Information Sheet #11Whether one particular bead is natural, treated or synthetic — only a laboratory report can settle that.What this page can answer
Q2What counts as jade: jadeite, nephrite or something else?
Gemmologists have long treated jadeite and nephrite as the materials properly called jade, and a few green omphacites have been added more recently.GIA Jade DescriptionOn laboratory reports, jade is a trade name covering aggregates of jadeite, omphacite, kosmochlor or nephrite, further specified by the mineral present.LMHC Information Sheet #11All are metamorphic rocks built from tiny interlocking mineral crystals, and this structure is what makes them exceptionally tough.GIA Jade DescriptionMuseum records also use jade as an umbrella term, so each object's specific material, nephrite or jadeite, has to be resolved.Cleveland Museum of Art 1953.628 · The Met 1989.314.1 +3
Q3Is jade often treated or dyed?
Yes: dyed, bleached-and-impregnated, coated or heated jade is common.GIA Gem Encyclopedia (care guide)For selectively dyed nephrite carvings, AGTA advises keeping them from chemicals, ultrasonic cleaners and strong light.AGTA Gemstone Information Manual, 17th ed.Whether one particular bead is natural, treated or synthetic — only a laboratory report can settle that.What this page can answer
Q4Is jade tough enough for a bangle worn every day?
Jadeite and nephrite are both exceptionally tough and rarely break or chip, yet they can still be scratched.GIA Gem Encyclopedia (care guide)Jadeite is 6.5–7 and nephrite 6–6.5 on the Mohs scale, so some care is needed to avoid scratches.GIA Gem Encyclopedia (care guide)A jeweller's torch flame is hot enough to damage jade.GIA Gem Encyclopedia (care guide)
Q5How should you clean jade, and can it get wet?
Warm water with mild soap is always safe; ultrasonic and steam cleaning are considered safe only for untreated jade, and because jade may have been treated, the soapy water method is the safe choice.GIA Gem Encyclopedia (care guide)Keep jade away from warm acids, which can affect it.GIA Gem Encyclopedia (care guide)
Q6How do jadeite and nephrite form?
Jadeite-type jade, or fei cui, forms in subduction zones, where oceanic crust is carried deep into the earth, creating a high-pressure, relatively low-temperature setting that favours jadeite crystallization.G&G Summer 2023Its bodies form veins or pods within serpentinized peridotite.G&G Summer 2023Nephrite forms by hydrothermal metamorphism, either when silica-rich fluids infiltrate dolomite-rich rocks or when calcium-rich fluids react with serpentinites.G&G Summer 2023The sources give no absolute age or growth duration for jade, only its formation settings.G&G Summer 2023
Q7Can jade change colour in the sun?
Light does not alter jade.GIA Gem Encyclopedia (care guide)Selectively dyed nephrite carvings are an exception, and AGTA advises keeping them from strong light.AGTA Gemstone Information Manual, 17th ed.
Q8What makes good-quality jade?
For jadeite jade, GIA ranks the three most important qualities, in order, as colour, transparency and texture.GIA Jade Quality FactorsThe best jadeite is semitransparent, so that text read through it appears only slightly blurred.GIA Jade Quality FactorsFor nephrite, CIBJO's reference guide for retailers says collectors value strong natural colours, pieces carved into symbols and sophisticated carvings.CIBJO Retailers' Reference Guide (2021)The pure white nephrite known in the trade as 'mutton fat jade' is highly appreciated.CIBJO Retailers' Reference Guide (2021)
Q9What does jade symbolize, and does it have healing powers?
There is no scientific evidence that jade has healing powers: the UK advertising regulators ASA and CAP state that they have not seen evidence that crystal therapy can treat medical conditions.ASA/CAP guidance (UK)Its recorded cultural role in birthstone lists is as an alternative for March on the chart of the U.K. National Association of Jewellers.Cultural recordsMuseum objects catalogued as jade come from China, Mesoamerica and Costa Rica, such as a Shang–Zhou piece of about 1200–900 BCE and a Maya piece of 400–900 CE, showing several jade materials used independently in different regions.Cleveland Museum of Art 1953.628 · The Met 1989.314.1 +3
Sources cited in these answers ASA/CAP guidance (UK)
What this page can answer
This page covers
- How Jade forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- Caring for and wearing JadeDurability indicators and wearing advice
- Mohs hardness of JadeEach value with its source and check date
- Jade in English, Chinese and Japanese; national standard namesNames in four languages, the GB/T standard name and the suggested listing name; and: Which of GIA, FTC, CIBJO and Gem-A have a name for it on record, and do those agree?
- Name origin and history of JadeHow people have used it, with museum objects
- Listing and disclosing JadeThe listing name to use; what must be disclosed before sale
- Standard clauses that define JadeWhich clause defines it, each cross-checked
What we cannot conclude
- Whether one particular bead is natural, treated or synthetic — only a laboratory report can settle that.
- Geographic origin, unless an origin report accompanies the item.
- Price, rarity or investment value: this wiki covers naming and disclosure only.
Material research: formation, causes and history
What authoritative sources say about how this material forms, what causes its colour and optical effects, where its name comes from and how people have used it. Each statement carries an evidence grade and its sources; it describes the material in general, not any specific piece.
How it forms
'Jade' is an umbrella term, not a single species, covering jadeite (fei cui) and nephrite and, in qualified usage, some omphacite-bearing material; these are metamorphic rocks of tiny interlocking crystals and are exceptionally tough. Fei cui (jadeite-type) forms in subduction zones where convergent margins subduct oceanic crust deep, creating a high-pressure, relatively low-temperature environment favouring jadeite crystallization, with bodies as veins/pods in serpentinized peridotites. Nephrite forms by hydrothermal metamorphism (metasomatism): either silica-rich fluids infiltrate dolomite-rich rocks, or calcium-rich fluids interact with serpentinites. The word 'jade' has sometimes been erroneously applied to many similar-looking materials.
Scope: Covers an overview of the formation of the umbrella term "jade"; since it covers several different materials, formation content follows the sources for jadeite (fei cui) and nephrite respectively, without conflating the two.
Sources GIA Jade Description · G&G Summer 2023
Where it forms
Jadeite-type jade: subduction zones, high-pressure relatively low-temperature; as veins/pods in serpentinized peridotites.
Sources G&G Summer 2023
Nephrite: hydrothermal metamorphism (metasomatism), in which silica-rich fluids act on rocks rich in dolomite, or fluids rich in calcium act on serpentinites.
Sources G&G Summer 2023
How it forms, step by step
(Jadeite-type) oceanic crust subducts deep along a convergent margin, creating a high-pressure, low-temperature setting.
(Jadeite-type) jadeite crystallizes as veins/pods in serpentinized peridotites, later exhumed/exposed.
(Nephrite) silica-rich or calcium-rich fluids react with dolomite-rich rocks or serpentinites to form nephrite.
Link to appearance
'Jade' is an appearance/umbrella word spanning several distinct materials; the name or appearance alone cannot determine mineral identity, naturalness, treatment, or origin.
Sources GIA Jade Description
Timescale
The sources in this record give no absolute age or growth duration for 'jade'; only formation settings.
Sources G&G Summer 2023
Related base materials
- jadeite jade: Jadeite-type material that the generic term 'jade' can cover
- nephrite jade: Nephrite material that the generic term 'jade' can cover
- omphacite-bearing jade: Can also be included within 'jade' under restricted circumstances
Supporting findings
Fei cui jade (dominantly jadeite) is produced in subduction-zone settings where convergent margins subduct oceanic crust deep within the earth, creating a high-pressure, relatively low-temperature environment favourable for jadeite crystallization.
Evidence grade AScope: Applies to jadeite-type jade (fei cui); not nephrite.
Nephrite jade arises through hydrothermal metamorphism, i.e. metasomatism, along two possible routes: silica-rich fluids may infiltrate rocks rich in dolomite, or fluids rich in calcium may react with serpentinites.
Evidence grade AScope: Applies to nephrite; two parallel mechanisms given as 'either…or…'.
Recorded localities
Authoritative sources list the localities below; the list is not exhaustive.
Asia
- Hpakan, Kachin State, MyanmarJadeite: the sole commercial source of high-quality green, lavender and white jadeite (1990s; 'northern Myanmar', mining district from Table 1)
Sources Gems & Gemology Winter 2000
- Itoigawa, Niigata, JapanJadeite
Sources Gems & Gemology Winter 2000
- Polar Urals, RussiaJadeite
Sources Gems & Gemology Winter 2000
- Central Siberia, RussiaJadeite
Sources Gems & Gemology Winter 2000
- Itmurundy, Qaraghandy, KazakhstanJadeite
Sources Gems & Gemology Winter 2000
- Xiuyan, Liaoning, ChinaNephrite; printed as Xiu Lan County
Sources Gems & Gemology Winter 2000
North America
- British Columbia, CanadaNephrite
Sources Gems & Gemology Winter 2000
- Alaska, United StatesNephrite
Sources Gems & Gemology Winter 2000
These are localities recorded by authoritative sources, not an origin finding for any individual piece. The CIBJO Gemstone Book (2022, §4.2.3) says a place of origin names where a gem was mined or harvested, is a matter of opinion, does not imply a level of quality, and that cutting, processing or exporting centres must not be used to imply origin. See the origin determination guide and the overview of recorded localities.
Human use and museum objects
In museum records "Jade" is an umbrella term covering nephrite (tremolite) and jadeite; e.g. Cleveland 1953.628 (c. 4700–2920 BCE, nephrite) and The Met 1993.114 (1st–5th century, Costa Rica, Jadeite) and 1989.314.1 (10th–4th century BCE, Olmec, Jade) fall under different materials within that umbrella, so each object's specific material must be resolved rather than replaced by the umbrella term.
Evidence grade AScope: Catalogue objects attest only to the existence and dating of those individual pieces; they are not evidence that the material was in common use in antiquity, nor do they attest to the origin, naturalness or treatment of any modern sample. Cultural attributions follow the museum's records and are not extended.
Sources Cleveland Museum of Art 1953.628 · The Met 1989.314.1 · Cleveland Museum of Art 1952.474 +2
- Cleveland Museum of Art — Amulet in the Form of a Seated Figure with Bovine Head (1953.628)
- The Metropolitan Museum of Art — Openwork Pendant (1989.314.1)
- Cleveland Museum of Art — Bead (1952.474)
- The Metropolitan Museum of Art — Figure-Celt Pendant (1993.114)
- The Metropolitan Museum of Art — Ornament (1978.412.57)
Objects catalogued "Jade" occur across China, Mesoamerica and Costa Rica (e.g. The Met 1978.412.57, 400–900 CE, Maya; Cleveland 1952.474, c. 1200–900 BCE, China Shang–Zhou); this attests to the independent use of several jade materials in different regions, not to common use of a single material.
Evidence grade AScope: Catalogue objects attest only to the existence and dating of those individual pieces; they are not evidence that the material was in common use in antiquity, nor do they attest to the origin, naturalness or treatment of any modern sample. Cultural attributions follow the museum's records and are not extended.
Sources Cleveland Museum of Art 1953.628 · The Met 1989.314.1 · Cleveland Museum of Art 1952.474 +2
- Cleveland Museum of Art — Amulet in the Form of a Seated Figure with Bovine Head (1953.628)
- The Metropolitan Museum of Art — Openwork Pendant (1989.314.1)
- Cleveland Museum of Art — Bead (1952.474)
- The Metropolitan Museum of Art — Figure-Celt Pendant (1993.114)
- The Metropolitan Museum of Art — Ornament (1978.412.57)
"Jade" is an umbrella term in museum records covering several jade materials. The museum records cited here span different materials under it: nephrite (tremolite) such as Cleveland 1953.628 (c. 4700–2920 BCE, NE China Neolithic, jade (nephrite)); jadeite such as The Met 1993.114 (1st–5th century, Costa Rica, Jadeite); and also 1989.314.1 (10th–4th century BCE, Olmec, Jade), 1952.474 (c. 1200–900 BCE, China Shang–Zhou, jade) and 1978.412.57 (400–900 CE, Maya, Jade). These objects attest to the independent use of several jade materials in different regions; the umbrella term itself names no single material, so each object's specific material must be resolved.
Sources Cleveland Museum of Art 1953.628 · The Met 1989.314.1 · Cleveland Museum of Art 1952.474 +2
- Cleveland Museum of Art — Amulet in the Form of a Seated Figure with Bovine Head (1953.628)
- The Metropolitan Museum of Art — Openwork Pendant (1989.314.1)
- Cleveland Museum of Art — Bead (1952.474)
- The Metropolitan Museum of Art — Figure-Celt Pendant (1993.114)
- The Metropolitan Museum of Art — Ornament (1978.412.57)
Scope: Catalogue objects attest only to the existence and dating of those individual pieces; they are not evidence that the material was in common use in antiquity, nor do they attest to the origin, naturalness or treatment of any modern sample. Cultural attributions follow the museum's records and are not extended.
Objects cited
- Cleveland Museum of Art 1953.628jade (nephrite)
- The Met 1989.314.1Jade
- Cleveland Museum of Art 1952.474jade
- The Met 1993.114Jadeite
- The Met 1978.412.57Jade
Cultural records for this material: Birthstone list.
Other research findings
Gemologists have long treated jadeite and nephrite as the substances properly called jade; a few green omphacites have been added to that definition more recently. All are metamorphic rocks built from tiny, interlocking mineral crystals, and this structure is what makes them exceptionally tough.
Evidence grade BScope: Defines 'jade' as an umbrella term (jadeite, nephrite, and qualified omphacite); does not claim it is a single species.
Sources GIA Jade Description
Jadeite-type jade is dominated by the pyroxene jadeite (NaAlSi2O6) and may also contain related minerals such as omphacite; its bodies form veins or pods within serpentinized peridotite.
Evidence grade AScope: Describes jadeite-type composition and habit; not nephrite.
The word 'jade' has at times been wrongly applied to various gems and ornamental materials that resemble jade; when the term is used, it must be resolved to one specific material.
Evidence grade BScope: Defines the misapplication risk of the umbrella term; does not claim any named material is jade.
Sources GIA Jade Description
For jadeite jade, the three most important qualities, in order, are colour, transparency and texture; the best jadeite is semitransparent, so that text read through it appears only slightly blurred.
Evidence grade BScope: Covers jadeite jade only, as described by one educational source; not a grading standard and not a statement about the value of any piece. Nephrite is covered separately.
Sources GIA Jade Quality Factors
For nephrite, collectors value strong natural colours, pieces carved into symbols and sophisticated carvings; the pure white variety known in the trade as 'mutton fat jade' is highly appreciated.
Evidence grade BScope: Covers nephrite only, as described in a trade association's reference guide for collectors; not a grading standard and not a statement about the value of any piece.
Sources CIBJO Retailers' Reference Guide (2021)
Limits of this research
- Research status: Formation, occurrence or other material-specific findings found in authoritative sources
- 'Jade' is an umbrella term, not a single species; formation content is stated separately for jadeite and nephrite.
- The umbrella term can be misapplied to similar materials and must be resolved to a specific material.
- No absolute age or growth duration is given.
Methodology
- Origin determination and its limits
- Quality grading and value factors
- How gemmology became a technical discipline
Evidence grades
- A
- Standards bodies, government geological surveys, peer-reviewed research and museum records
- B
- Institutional educational material
- C
- Specialist databases or cautious readings
A statement is never graded above its strongest source.
This section is LumaLark's own factual restatement of public authoritative sources, credited item by item; it contains no verbatim excerpts, images or third-party logos.
DecideListing name, disclosure, care and treatments
- Suggested listing name
- State Jadeite jade, Nephrite jade, or Fei Cui as confirmed by report
GB/T 16552—2017 5.1.1 d) · CIBJO Gemmological Laboratories Book 2024 §7.2.1.117 “Jade”
Construction or treatment status
Natural identity; treatment status unknown
Related:Disclosure and cautions
This page cannot answer
Natural? · Origin · Price
A lab report settles these; this wiki covers naming and disclosure.
Related:What this page can answer
Answer at a glance
"Jade (generic term; specify material)" is a market name rather than a mineral species name; before using it, verify: Laboratory identification required before the name is used.
What this means for you
Before buying, check the recommended listing name "State Jadeite jade, Nephrite jade, or Fei Cui as confirmed by report" and any disclosed treatments on this page, and ask the seller for a grading report if in doubt.
Known uncertainty
- This entry's exact material identity is not fully settled.
- See “Disclosure and cautions” above
- Last reviewed
- 2026-09-01
Trade-name ruling
- Laboratory identification required before the name is used.
- Suggested listing name
- State Jadeite jade, Nephrite jade, or Fei Cui as confirmed by report
Care and wear
No institutional care guidance is registered for this material yet; below are its durability indicators and general guidance.
Durability and wearing
Mohs hardness
6–7
Toughness
Exceptional toughness; very resistant to breaking or chipping
Sources GIA Gem Encyclopedia (care guide)
VerifyNames, standards, technical facts, clauses and sources
Names
For Jade, "Jade" must not be used as a name (GB/T 16552—2017 §5.1.1 d); GB/T 16552—2017 §5.1.1 c); 16 CFR Part 23 §23.25(a)).
Chinese standard nameThe name Jade (as a collective term) is not listed in the standard, and GB/T 16552—2017 requires the basic name to be established by testing. Trade and mineralogical namesThe trade name or synonym is Jade, an English market name that must not be used as a product name; the related high-risk name for jade does not denote a single mineral species, so products must state the specific material. Recommended listing nameThe suggested listing name is the specific material: jadeite Fei Cui, nephrite, or Fei Cui as confirmed by a certificate. Names in four languagesNames are registered in four languages: Simplified Chinese and Traditional Chinese (both as a collective term), English (Jade, a collective term that must state the specific material) and Japanese (with the material to be specified); the wording used by the GSJ (Japan) for the Japanese name is not yet verified by this site. Institution usageOn authority wording, the wording of GIA and CIBJO is recorded; the FTC text on file has no wording for this name (checked), and Gem-A is unchecked. The qualifier “collective term; must state the specific material” shown for FTC and Gem-A comes from the entry's own English name for Jade and does not represent the position of the FTC or Gem-A. Trade and mineralogical namesThe mineralogical name is a general gem-material term that can cover jadeite Fei Cui, nephrite and, with restricted usage, omphacite-bearing material.
Name register
Every name recorded for this entry, with how it is classified, whether it may be matched to this entry automatically, whether it may be used as a product name, and the clause it rests on.
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| Name | Type | Matching | Use as a name | Basis |
|---|---|---|---|---|
| not to be used as a name (1) | ||||
| JadeEnglish | market name | matched automatically | not to be used as a name | GB/T 16552—2017 5.1.1 d); GB/T 16552—2017 5.1.1 c); 16 CFR Part 23 §23.25(a); Note: Related high-risk name “Jade”: yu is not a single mineral species; a product must name the specific material. |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- ジェード/玉(材質を特定) (not yet checked for this body — the entry's own Japanese name is shown)
- GB/T naming counterpart (this name is not in the standard)
- basic name to be determined by testing (GB/T 16552—2017 §5.1.1 d))
- Mineralogical name
- Generic gem-material term that may cover jadeite jade, nephrite jade and, in qualified usage, some omphacite-bearing material
- Trade names and synonyms
- Not to be used as a name: Jade (market name)
Four-language names
- 简体中文
- 玉(统称)
- 繁體中文
- 玉(統稱)
- English
- Jade (generic term; specify material)
- 日本語
- ジェード/玉(材質を特定)
Qualifiers stripped from the headline name
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Natural materials
- Material domain
- Natural inorganic gem materials
- Browsing family
- Jade materials
- Identity tier
- Mineral species
- Mineral chemical class
- Silicates
- Construction or treatment status
- Natural identity; treatment status unknown
What it is and how it's identified
Jade (the collective term), as a trade name in certificate contexts, covers aggregates formed of jadeite, omphacite, kosmochlor and nephrite, further subdivided by constituent mineral; the LMHC information sheet defines Jade as a trade name covering aggregates of fibrous or granular crystals. The LMHC information sheet notes that jade is an aggregate of several minerals and recommends that identification combine appearance, standard gemmological tests, chemical analysis and spectroscopy rather than relying on a single method. The CIBJO laboratory protocol places Jade (the collective term) under jadeite jade; for identification see identification on the Jadeite Jade entry, and the list of required methods is on the laboratory testing page.
Registered material facts
Each row carries its own source and check date and can be cited on its own; “—” means the cited source gives no value, not “none”.
Care
Jade — care (cleaning): Ultrasonic cleaning is considered safe only when the jade is untreated; dyed, bleached-and-impregnated, coated or heated jade is common; steam cleaning is likewise safe only for jade that has not been treated; because jade may have been treated, warm water with mild soap is the method that is always safe.
GIA Gem Encyclopedia (care guide)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA Gem Encyclopedia — Jade Care and Cleaning Guide: Section “Cleaning” (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
Jade — care (heat): A jeweller's torch flame is hot enough to damage jade
GIA Gem Encyclopedia (care guide)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA Gem Encyclopedia — Jade Care and Cleaning Guide: Section “Stability” (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
Jade — care (light): Light does not alter jade, though warm acid solutions may attack it.
GIA Gem Encyclopedia (care guide)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA Gem Encyclopedia — Jade Care and Cleaning Guide: Section “Stability” (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
care (chemicals)2 sources compared
Jade — care (chemicals): For nephrite carvings that have been selectively dyed, AGTA's chart advises keeping them from chemicals, ultrasonic cleaners and strong light.
AGTA Gemstone Information Manual, 17th ed.
- Treatment state
- treated
- Only after these treatments
- dyeing
Source & check 2026-10-06
- Source
- AGTA Gemstone Information Manual, 17th edition (August 2026) (AGTA): p.XI, Gemstone Information Chart, Nephrite D, CARE REQUIRED / SPECIAL ADVICE (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
Jade — care (chemicals): Keep jade away from warm acids, which can affect it.
GIA Gem Encyclopedia (care guide)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA Gem Encyclopedia — Jade Care and Cleaning Guide: Section “Stability” (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
Jade — care (wear): Jadeite and nephrite are both exceptionally tough and rarely break or chip, yet they can still be scratched.
GIA Gem Encyclopedia (care guide)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA Gem Encyclopedia — Jade Care and Cleaning Guide: Section “Hardness and toughness” (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
How far testing can go
The CIBJO laboratory protocol covers Jade under “Fei Cui / Jadeite Jade” (§6.1.44): see identification on the Fei Cui / Jadeite Jade entry; the required tests are listed on the CIBJO laboratory protocol table for Fei Cui / Jadeite Jade.
How lab reports word it
Jade — how lab reports word it (definition used on reports): On reports “jade” is a trade name covering aggregates of jadeite, omphacite, kosmochlor or nephrite, further specified by the mineral present.
LMHC Information Sheet #11
Definition in the information sheet (original wording): Jade is a trade name that encompasses aggregates of fibrous or granular crystals
- Case
- when the variety name may be used
Source & check 2026-09-26
- Source
- LMHC Information Sheet #11, Version 5, May 2025 (LMHC): p.1, “Definitions”, Jade (Information Sheet #11) (locator checked 2026-09-28)
- Fact checked on
- 2026-09-26
Jade — how lab reports word it (suggested testing): Because jade is a mixed aggregate, the sheet recommends combining appearance, standard tests, chemistry and spectroscopy rather than relying on one method.
LMHC Information Sheet #11
Rule in the information sheet (original wording): For a correct identification, it is suggested to take into account
- Case
- all cases
Source & check 2026-09-26
- Source
- LMHC Information Sheet #11, Version 5, May 2025 (LMHC): p.1, “Suggested Testing Procedure” (Information Sheet #11) (locator checked 2026-09-28)
- Fact checked on
- 2026-09-26
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
Clause-level definitions
Jade (as a collective term) has a direct definition in the CIBJO Gemmological Laboratories Book 2024 under the entry name Jade. The CIBJO Gemmological Laboratories Book 2024 definition states that the name jade is usually applied to nephrite as well as to jadeite, omphacite or a mix of the two. The cross-check result is that it is defined directly by CIBJO and also appears in the GB/T annex.
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| Term | Clause | Definition | Cross-check |
|---|---|---|---|
| Jade | 7.2.1.117 | Jadeite, omphacite (or a combination of both) and nephrite are commonly called jade | Defined directly by CIBJO; also present in the GB/T annex. |
Evidence and sources
Authority basis and clause sources
Sources
- CIBJO – The World Jewellery Confederation. Gemmological Laboratories Book (Blue Book), Gemmological Commission 2024-1.
- CIBJO – The World Jewellery Confederation. The Gemstone Book (Blue Book), 2022.
- SAMR / SAC (China). GB/T 16552—2017 Gems — Nomenclature.
- GIA – Gemological Institute of America (United States). Gem Encyclopedia: Jade Description.
Further reading
Recorded cultural contexts
The U.K. National Association of Jewellers chart lists Jade as an alternative for March. This records trade-association convention only; it does not establish material identity, natural origin, treatment, provenance, or effect.
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| Publisher or holder | Region | From / period | Source and locator |
|---|---|---|---|
| National Association of Jewellers | United Kingdom | — | National Association of Jewellers, “Zodiac Birthstones Jewellery: Star Signs, Gemstones and Their Meaning” (web page, consulted 2026-08-22) Zodiac birthstone chart, March row: Jade (Alternative) |
Related entries and topic cluster
Parent entry and related pages on this site. Rows marked “Planned” are suggested new content and have no link yet.
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| Page | Content | Status |
|---|---|---|
| Browsing family | Jade materials | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Jade entry are maintained by the LumaLark wiki and matched one by one to the standard clauses or institutional sources they cite: every fact carries its source (with a clause or page locator) and a check date, so it can be traced back to the original; clause-level definitions also carry a cross-check result. The entry exists so that buyers and sellers can check naming, disclosure and material facts item by item.