On this page
UnderstandWhat it is, what people ask, how far this page goes
Natural inorganic gem materials · Mineral / gemstone variety · Natural identity; treatment status unknown
Hessonite
Also known asHessonite garnet
An orange to reddish-brown variety of Grossular, not a separate mineral species. Also known as Hessonite garnet. 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.
What this page can answer
This page covers
- How Hessonite forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- How to identify HessoniteHow far lab testing can go and whether a synthetic exists
- Treatments and enhancements of HessoniteThe enhancements and treatments the GB/T and JJA/AGL tables list
- Caring for and wearing HessoniteCleaning, heat, chemicals and light, as the cited sources give them
- Hardness, density and refractive index of HessoniteEach value with its source and check date
- Hessonite 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?
- Listing and disclosing HessoniteThe listing name to use; what must be disclosed before sale
- Standard clauses that define HessoniteWhich 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
None of the cited sources defines hessonite separately; it is treated as a colour variety of grossular (Ca3Al2Si3O12) rather than an independent mineral species. Garnet is a group of closely related species sharing essentially the same crystal structure but differing in chemistry, and grossular is one of the five garnet species of commercial gem importance; often a garnet is a chemical mixture of two or more species. Since these sources supply no definition or formation conditions for 'hessonite', this entry confirms only its variety-level parentage and does not put grossular's formation in place of hessonite's; its exact composition and formation conditions cannot be verified from the available sources.
Scope: Used to explain the identity boundary of "hessonite" as a colour variety of grossular; formation facts of grossular are not substituted for its genesis.
Sources GIA Garnet Description
Where it forms
Grossular (and its colour varieties) is generally associated with metamorphic and contact-metamorphic/skarn settings; the cited sources give no occurrence for 'hessonite' itself.
Sources GIA Garnet Description
The cited sources give no formation setting for 'hessonite'; nothing specific is inferred here.
Sources GIA Garnet Description
How it forms, step by step
Garnet-group minerals crystallize from suitable bulk-rock chemistry under metamorphic conditions (group-level fact).
Sources GIA Garnet Description
Grossular, one of the commercially important garnet species, varies in composition within the garnet group's solid-solution series.
Sources GIA Garnet Description
'Hessonite' is not separately defined in the cited sources; its exact composition and formation pathway cannot be verified from the available text.
Sources GIA Garnet Description
Link to appearance
The cited sources do not describe hessonite's specific appearance (such as the orange to reddish-brown colour and internal features implied by the name); nothing further is inferred.
Sources GIA Garnet Description
Timescale
The cited sources give no formation timescale for 'hessonite'.
Sources GIA Garnet Description
Related base materials
- Grossular garnet (Ca3Al2Si3O12): variety-of | Hessonite is regarded as a colour variety of grossular
- Garnet group (nesosilicates): group-of | Belongs to the garnet mineral group
Recorded localities
Authoritative sources list the localities below; the list is not exhaustive.
Asia
- Elahera gem field, Central Province, Sri Lanka
Sources Gems & Gemology Summer 1986
- Sabaragamuwa and Southern provinces, Sri LankaSource table lumps grossular/hessonite/tsavorite together
Sources Gems & Gemology Fall 2010
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 how far testing can go on this page, the origin determination guide and the overview of recorded localities.
Other research findings
Garnet is a group of closely related mineral species sharing essentially the same crystal structure but differing in composition; often a garnet is a chemical mixture of two or more species.
Evidence grade AScope: A general description of the garnet group, not a specific definition of 'hessonite'.
Sources GIA Garnet Description
Grossular ranks among the five garnet species of commercial gem importance.
Evidence grade AScope: A species-level framing of grossular; hessonite is treated as a subordinate variety.
Sources GIA Garnet Description
'Hessonite' is not separately defined in the cited authoritative sources and should be treated as a colour variety of grossular rather than an independent mineral species.
Evidence grade CScope: A boundary based on an absence in the sources rather than a direct statement; grossular facts must not stand in for hessonite's definition.
Sources GIA Garnet Description
Taken together, the cited sources indicate that 'hessonite' should be framed as a colour-variety name of grossular; its definition and formation conditions await authoritative clarification.
Evidence grade CScope: A synthesis rather than a direct source statement, limited by the absence of a definition.
Sources GIA Garnet Description
Limits of this research
- Research status: Only partial material-specific findings found; gaps are stated as gaps
- The cited authoritative sources give no definition, composition or formation conditions for 'hessonite' itself.
- Its identity conclusion rests on an absence in the sources and is a terminology-level judgement, not a mineralogical ruling.
- Facts about grossular or other related species must not stand in for the formation of 'hessonite'.
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
- Hessonite
IMA Mineral List 2026-07 “Grossular” · CIBJO Gemmological Laboratories Book 2024 §7.2.1.107 “Hessonite”
Construction or treatment status
Natural identity; treatment status unknown
Treatments recorded for this material: Heated / Heat-treated (via parent material), Filled / Fracture-filled (via parent material)
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
Hessonite is Orange to reddish-brown grossular garnet variety; use "Hessonite" for listings, and disclose any known treatments.
Evidence
- CIBJO · 7.2.1.107
What this means for you
Before buying, check the recommended listing name "Hessonite" and any disclosed treatments on this page, and ask the seller for a grading report if in doubt.
Known uncertainty
- Last reviewed
- 2026-09-01
Care and wear
Normal care for every gemstone (CIBJO Gemstone Book §6.1), in brief:
- Handle it gently.
- Store pieces apart when not worn, so they cannot scratch each other.
- Clean with warm soapy water and a soft brush.
- Use ultrasonic cleaners only with caution.
The §6.1 wording and the full list of §6.2 special-care letters cited on this page are on the general gem care page.
The item-by-item care advice that the GIA Care and Cleaning Guide gives for the whole class, and so for Hessonite, is set out in full under care on the Garnet entry.
Care
Hessonite — care (heat): Some stones are prone to damage due to thermal shock. Do not expose them to extreme temperature changes.
CIBJO Gemstone Book 2022
CIBJO Gemstone Book §6.2:special-care code e
- Treatment state
- any treatment state
Source & check 2026-09-25
- Source
- CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022) (CIBJO): §8 Annex C, Hessonite, p.55; §6.2 e (locator checked 2026-09-25)
- Fact checked on
- 2026-09-25
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
Common care questions and matching entries
HeatHessonite is sensitive to sudden temperature changes, in any treatment state; the conclusion comes from the CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022). CleaningThe Gemological Institute of America (GIA) care and cleaning guide is given for the whole class, so it also applies to Hessonite; its item-by-item advice is listed in full in the care section of the Garnet entry. General careGeneral care that applies to all gemstones, and the full table of special-care letters, are in the general care section of the materials index page.
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| Question | Matching entries |
|---|---|
| Heat and thermal shock | care (heat) |
Treatments and identification leads
One row per treatment, with three standards side by side: how often it occurs and how stable it is (CIBJO), its category in GB/T 16552—2017 Table B.1 (this site's paraphrase) and how the JJA/AGL 2025 table lists it. Each CIBJO value links to its entry under “Testing and market”, where the wording and source are given in full.
This table scrolls sideways on narrow screens.
| Treatment | Market frequency (CIBJO) | Stability (CIBJO) | GB/T 16552 category | JJA/AGL listing | Identification leads |
|---|---|---|---|---|---|
| Heating | — | — | Optimization | — | — |
| Filling | — | — | Graded — see §5.4.1, Table 1 | — | — |
“—” means the cited source gives no value for that item, not “none”. Source: GB/T 16552—2017 Table B.1 (row for Garnet); JJA/AGL 2025
Whether a treatment has to show in the name differs between the two rule sets (this site’s paraphrase):
- GB/T 16552—2017: a method classed as treatment has to be stated in the name itself — the method put before the name, or added in brackets after it; a method classed as optimization does not need to appear in the name, though one marked “Optimization (annotation required)” still has to be noted in the quality documents. Source: §5.4.2.1 a), b); §5.4.2.2 a)
- CIBJO Gemstone Book 2022: no longer splits treatments into ones that need specific disclosure and ones that need only general disclosure: every treatment is to be disclosed, and the seller tells the buyer which treatment was used and what special care it calls for. Source: §4.2.5 Note 2, §4.2.5.1, pp.14–15
What this table covers
What this page can give
- Registered treatments, their stability and how often they occur (see the table above)
- Identification leads for each treatment, for use when sending a stone for testing
VerifyNames, standards, technical facts, clauses and sources
Names
Besides Hessonite, the name register records "Hessonite garnet", for which no restriction on use as a name is recorded; 2 further names in non-Latin scripts are listed in the name register below (2 with no restriction recorded on use as a name).
Recommended listing nameThe Chinese formal name for Hessonite is given in GB/T 16553—2017, and the suggested listing name is Hessonite. Names in four languagesThe names are the same in Simplified and Traditional Chinese, the English is Hessonite, and the Japanese is a transliteration and a kanji name. Trade and mineralogical namesMineralogically it is described as an orange to reddish-brown variety of grossular; the trade name or synonym is Hessonite garnet, and it is also known by another Chinese name. Institution usageAmong authority wordings, CIBJO lists Hessonite (see the CIBJO Gemmological Laboratories Book 2024); the FTC has been checked, and its source text has no wording for this name; GIA and Gem-A have not been checked. Bodies without a recorded wording show the entry's own English name, which does not represent their position. Japanese namesOn the Japanese side, the entry's own Japanese names are a transliteration and a kanji name, and the Japanese GSJ wording for this name is not yet verified by this site. Candidate search termsThe JJA/AGL gem names handbook 2025 records a Japanese transliteration of Hessonite Garnet, which is only a candidate search term.
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 |
|---|---|---|---|---|
| no restriction recorded (3) | ||||
| Hessonite garnetEnglish | market name | matched automatically | no restriction recorded | editorial ruling (no clause cited) |
| ヘソナイト・ガーネットJapanese | transliteration | search candidate only | no restriction recorded | JJA/AGL Gemstone Nomenclature 2025 p.10 |
| 贵榴石Simplified Chinese | synonym | matched automatically | no restriction recorded | GB/T 16553—2017 5.1.15 |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- ヘソナイト／肉桂石 (not yet checked for this body — the entry's own Japanese name is shown)
- Chinese formal name
- 桂榴石 (GB/T 16553—2017 §5.1.15)
- Mineralogical name
- Orange to reddish-brown grossular garnet variety
- Trade names and synonyms
- Hessonite garnet (market name)
Four-language names
- 简体中文
- 桂榴石
- 繁體中文
- 桂榴石
- English
- Hessonite
- 日本語
- ヘソナイト／肉桂石
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Natural materials
- Material domain
- Natural inorganic gem materials
- Browsing family
- Garnet-group minerals and gem varieties
- Identity tier
- Mineral / gemstone variety
- Mineral chemical class
- Silicates
- Construction or treatment status
- Natural identity; treatment status unknown
Treatments listed by standards
GB/T Table B.1For Hessonite, this site applies the Garnet row of GB/T 16552—2017 Annex B, Table B.1: heating is listed as optimization, and filling is classed by the grades set out in the standard. The notes to Table B.1 and the definitions of the filling grades are on the Gem treatments page, and the full row with the effect column is on the Garnet page. JJA/AGL designationsThe table of principal gem names in the JJA/AGL (Japan) definitions and nomenclature, November 2025 revision, lists Hessonite under the species grossular, in yellowish orange to brownish orange, and notes that the JJA/AGL table lists an untreated tier; how to read the JJA/AGL table is explained on the Gem treatments page.
GB/T 16552-2017, Annex B, Table B.1
Under the “Garnet” row of Table B.1: Heating Optimization; Filling Graded — see §5.4.1, Table 1. The full row, with the effect column, is on the Garnet page.
What Table B.1 is, and how the “see 5.4.1” grades are defined: see the GB/T 16552: optimization vs treatment page.
JJA/AGL (Japan) table of principal gem names, 2025
This table scrolls sideways on narrow screens.
| Gem name | Species | Colour | Listed in the table | Notes |
|---|---|---|---|---|
| Hessonite | Grossular | yellowish orange to brownish orange | an untreated tier is listed |
JJA/AGL definitions and nomenclature (2025 revision), table of principal gem names, p.10
How to read the JJA/AGL table: see the Gem treatments page.
What it is and how it's identified
Hessonite is a brownish yellow grossular, with features matching grossular, and its composition is grossular (garnet group). Crystalline, cubic, Mohs hardness 7–8, no cleavage, isotropic optic character with common anomalous extinction, and, untreated, no pleochroism and a vitreous to subadamantine lustre are all registered for garnet (the whole mineral group). Density 3.57–3.73 g/cm³ and refractive index 1.73–1.76 are taken for grossular (the whole mineral species), worked out from the clause values 3.61 (tolerance +0.12, −0.04) and 1.740 (tolerance +0.020, −0.010). The untreated body colour registered by CIBJO is brownish yellow-orange to red-orange.
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”.
Chemical composition, luminescence, UV-visible spectrum, infrared spectrum, magnification: these whole-class features are given in the cited clause for garnet (the whole mineral group), so they are not repeated on the Hessonite page; see the material facts on the Garnet entry.
Items below that name the class they cover give the cited clause’s value for that whole class, not a measurement of Hessonite (how to read class-level values).
Definition
Hessonite: a brownish-yellow variety of grossular that shares grossular's properties
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 Additional notes · Hessonite (locator checked 2026-09-28)
- Fact checked on
- 2026-09-26
Hessonite — composition (phase): grossular (garnet group)
CIBJO Gemmological Laboratories Book 2024
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Structure
Hessonite — structure (overall): crystalline
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Hessonite — structure (crystal system): cubic
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Hessonite — structure (crystal habit): rhombic dodecahedra, tetragonal trisoctahedra, or crystals combining the two forms.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Durability
Hessonite — Mohs hardness: 7–8
GB/T 16553—2017
Reference points on this site: Talc 1–3, Fluorite 4, Apatite 5–5.5, Orthoclase 6–6.5, Topaz 8, Diamond 10 (Source: GB/T 16553—2017); Gypsum 1.5–2, Calcite 3, Quartz 7 (Source: Handbook of Mineralogy); Corundum 9 (Source: GIA Gem Encyclopedia (care guide))
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Hessonite — cleavage: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Physical properties
Hessonite — density: 3.57–3.73 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- grossular (the whole mineral species)
- Qualification
The clause we cite gives 3.61, with a stated tolerance of +0.12 / -0.04. The range shown here is worked out from that.
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 Density · Grossular (locator checked 2026-09-28)
- Fact checked on
- 2026-09-26
Hessonite — density: 3.5–4.3 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
- General note
- the clause has finer ranges
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Optical
Hessonite — optic character: isotropic, commonly with anomalous extinction
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Hessonite — refractive index: 1.73–1.76
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- grossular (the whole mineral species)
- Qualification
The clause we cite gives 1.740, with a stated tolerance of +0.020 / -0.010. The range shown here is worked out from that.
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 Refractive index · Grossular (locator checked 2026-09-28)
- Fact checked on
- 2026-09-26
Hessonite — birefringence: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Hessonite — pleochroism: none
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Hessonite — spectrum (UV-visible): iron-coloured hessonite: may have 407 nm absorption band; may have 430 nm absorption band.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 UV-visible spectrum (locator checked 2026-09-28)
- Fact checked on
- 2026-09-26
Hessonite — optical effect (asterism): seen; rare; generally a four-pointed star; occasionally a six-rayed star (almandine).
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Hessonite — optical effect (colour change): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Hessonite — body colour: (brownish) yellow-orange to reddish orange.
CIBJO Gemmological Laboratories Book 2024
- Treatment state
- untreated
- Qualification
In chapter 7 of the CIBJO Gemmological Laboratories Book, the colour descriptions of Fire Opal, Malaya Garnet, Mali Garnet and other entries also name orange or an orangish colour.
- General note
- colour alone is not identity
Source & check 2026-09-26
- Source
- Fact checked on
- 2026-09-26
- CIBJO definitions
- asterism, colour change
Quality factors
Hessonite — quality factor (lustre): vitreous to subadamantine
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- garnet (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.15 (locator checked 2026-09-26)
- 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.
This material (RI / SG midpoints): 1.745 / 3.9; Closest values: 1Pyrope 1.728 / 3.9, 2Burma Ruby 1.768 / 4, 3Ceylon Sapphire 1.768 / 4.03, 4Alexandrite 1.749 / 3.73, 5Almandine 1.79 / 3.9
Show the full chart (330 registered materials)
Outside the full chart's range, drawn as triangles at the edge (RI / SG midpoints): Hematite 3.045/5.12, Synthetic Rutile 2.76/4.26, Rutile 2.753/4.23, Synthetic Moissanite 2.67/3.22
Testing and market
The CIBJO laboratory protocol places Hessonite under “Garnet”: for identification see the Garnet entry, and the required tests are listed on the laboratory testing page. As for synthetics, no synthetic counterpart of Hessonite is on the market.
The CIBJO laboratory protocol covers Hessonite under “Garnet” (§6.1.38): see identification on the Garnet entry; the required tests are listed on the CIBJO laboratory protocol table for Garnet.
How far testing can go
Hessonite — synthetic counterpart on the market: No synthetic counterpart of this material is commercially available
CIBJO Gemstone Book 2022
- Treatment state
- any treatment state
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
Clause-level definitions
Hessonite is listed entry by entry under the name Hessonite in the CIBJO Gemmological Laboratories Book 2024, as a direct CIBJO definition; the definition gives the mineral group as garnet, the mineral species as grossular and the mineral/gem variety as hessonite, with the CIBJO wording quoted in full under Clause-level definitions on this page. The cross-check result is that it is defined directly by CIBJO, and no identically named English entry was found in this edition of the GB/T annex.
This table scrolls sideways on narrow screens.
| Term | Clause | Definition | Cross-check |
|---|---|---|---|
| Hessonite | 7.2.1.107 | (brownish) yellow-orange to reddish orange variety of grossular | Defined directly by CIBJO; no identically named English entry was found in this edition of 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.
- RRUFF Project, in partnership with the IMA – International Mineralogical Association. IMA Mineral List.
- Geological Survey of Japan, AIST (Japan). Museum mineral specimens, browse by classification.
Further reading
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.
Related-entry tree for Garnet on this site: 10 entries listed by this site's parent-entry links; synthetic, treated and similar entries carry their recorded state after the name; this page (Hessonite) is marked.
- Garnet
Sub-entries (9)
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| Page | Content | Status |
|---|---|---|
| Browsing family | Garnet-group minerals and gem varieties | Live |
| Treatments recorded for this material | Heated / Heat-treated (via parent material), Filled / Fracture-filled (via parent material) | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Hessonite 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.