On this page
UnderstandWhat it is, what people ask, how far this page goes
Natural inorganic gem materials · Trade name: inclusion / visual-effect descriptor · Natural identity; treatment status unknown
Quartz with dark needle-like inclusions
Also known asBlack hair quartz (not to be used as a name) · Tourmalinated quartz (conditional name)
A trade name for quartz with black needle-like inclusions, which may be black tourmaline, rutile or actinolite; it cannot be named without identification. Also known as Tourmalinated quartz. 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 Quartz with dark needle-like inclusions forms and what gives its colourFormation setting, process and timescale; where its colour and optical effects come from, each finding graded and sourced
- Treatments and enhancements of Quartz with dark needle-like inclusionsThe enhancements and treatments the GB/T and JJA/AGL tables list
- Hardness, density and refractive index of Quartz with dark needle-like inclusionsEach value with its source and check date
- Quartz with dark needle-like inclusions in English, Chinese and Japanese; national standard namesNames in four languages, the GB/T standard name and the suggested listing name; and: Has any of GIA, FTC, CIBJO or Gem-A put a name for it on record here?
- Listing and disclosing Quartz with dark needle-like inclusionsThe listing name to use; what must be disclosed before sale
- Standard clauses that define Quartz with dark needle-like inclusionsWhich 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
'Black-hair quartz' refers to quartz hosting black needle- or hair-like mineral inclusions; it is quartz (SiO2), not a separate mineral. Quartz crystals grow inward from the walls of open cavities out of silica-rich fluid and trap coexisting needle minerals during growth; primary inclusions are commonly found along growth layers and elongate along the growth direction, producing the visible 'hair' appearance. In the authoritative sources, black inclusions in quartz have been identified by Raman analysis as hematite (platy and syngenetic with the quartz host), and needle/'hair-like' black to reddish inclusions are thought to be hematite; the exact inclusion species behind the trade name 'black-hair quartz' must be tested case by case.
Scope: Covers the mechanism by which black acicular/hair-like inclusions are trapped during growth in natural quartz; does not cover artificially filled, coated or dyed imitation "hair crystal" material.
Sources G&G Fall 2024 · G&G Spring 2017
- “Rose” Quartz (Gems & Gemology, Fall 2024, Vol. 60, No. 3, Micro-World)
- Amethyst from Newfoundland, Canada: Geology, Internal Features, and Fluid Inclusion Microthermometry (Gems & Gemology, Fall 2024, Vol. 60, No. 3)
- Causes of Iridescence in Natural Quartz (Gems & Gemology, Spring 2017, Vol. 53, No. 1, Lin & Heaney)
Where it forms
Open cavities/vugs where quartz grows inward from the walls out of silica-rich fluid and inclusions are trapped.
Sources G&G Spring 2017 · G&G Fall 2024
A quartz growth system coexisting with black needle-forming minerals, whose needles are trapped by the quartz.
Sources G&G Fall 2024
Epigenetic setting: quartz can crystallize with coexisting minerals such as iron oxides in hydrothermal veins/cavities.
Sources G&G Spring 2017 · G&G Fall 2024
How it forms, step by step
Silica-rich fluid enters a cavity/vug and quartz crystallizes inward from the wall.
Black needle-like minerals coexisting with the quartz form in the growth system.
During growth the quartz traps the needles, and primary inclusions are found along growth layers and elongate along the growth direction.
The inclusions are positioned along growth planes, syngenetic with the quartz host, forming a stable 'hair' structure.
Link to appearance
The type, thickness, orientation and density of the black needle inclusions govern the 'hair' appearance; contrast between the inclusions and the quartz host makes them clearly visible in transmitted light as black hair-like strands.
Sources G&G Fall 2024
Timescale
The sources give no absolute age or duration for quartz or inclusion growth; inclusion entrapment is described only in terms of growth stages/planes.
Sources G&G Fall 2024
Related base materials
- Quartz (SiO2): inclusion-variety-of | Quartz with dark needle-like inclusions is quartz containing black needle-like/hair-like mineral inclusions
Supporting findings
During crystal growth, quartz captures primary inclusions that tend to lie along growth layers and stretch parallel to the growth direction, which gives them their needle-like 'hair' look.
Evidence grade AScope: The source is the Canadian La Manche amethyst (a quartz variety) case; the trapping mechanism is analogous to other quartz hosting needle inclusions.
Inclusion-bearing quartz crystals commonly grow inward from the walls of open vugs out of silica-rich fluid, forming druses.
Evidence grade AScope: The source is a quartz druse in Deccan Trap basalt vugs, India; a general quartz occurrence setting.
Causes of colour and optical effects
Quartz can host needle-like, hair-like black to reddish-brown inclusions (some suspected to be hematite or goethite), whose orientation and density govern the appearance.
Evidence grade AScope: The source is an amethyst case listing hematite, goethite, sulfides, etc.; some identifications are 'thought to be'.
Other research findings
Black inclusions in quartz have been identified by Raman analysis as hematite and can be positioned along growth planes, syngenetic with the quartz host; however, the inclusion species behind 'black-hair quartz' must be tested case by case and cannot be assumed to be hematite.
Evidence grade BScope: The source is colorless quartz spheres hosting black platy hematite inclusions, not material traded as black-hair quartz; it only shows quartz can host black hematite inclusions.
Sources G&G Fall 2024
Limits of this research
- Research status: Formation, occurrence or other material-specific findings found in authoritative sources
- The inclusion species in 'black-hair quartz' is not specified by the authoritative sources and must be tested per stone; the sources only show quartz can host black hematite inclusions.
- Some black needle inclusions are described as 'thought to be hematite', leaving their identity uncertain.
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
- Quartz with black needle-like inclusions
GB/T 16552—2017 5.1.1 c) · CIBJO Gemmological Laboratories Book 2024 §7.2.1.245 “Tourmalinated quartz”
Construction or treatment status
Natural identity; treatment status unknown
Treatments recorded for this material: Heated / Heat-treated (via parent material), Irradiated (via parent material), Filled / Fracture-filled (via parent material), Dyed (via parent material), Coated (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
"Quartz with dark needle-like inclusions" is a market name rather than a mineral species name; before using it, verify: Trade name rather than a mineralogical species name.
What this means for you
Before buying, check the recommended listing name "Quartz with black needle-like inclusions" 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
- Trade name rather than a mineralogical species name.
- Suggested listing name
- Quartz with black needle-like inclusions
Care and wear
No care facts are recorded for this entry itself. Its parent material has care records: see Quartz.
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 | — | — |
| Irradiation | — | — | Optimization | — | — |
| Filling | — | — | Graded — see §5.4.1, Table 1 | — | — |
| Dyeing | — | — | Treatment | — | — |
| Coating | — | — | Treatment | — | — |
“—” means the cited source gives no value for that item, not “none”. Source: GB/T 16552—2017 Table B.1 (row for Rock Crystal)
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
VerifyNames, standards, technical facts, clauses and sources
Names
For Quartz with dark needle-like inclusions, "Tourmalinated quartz" is recorded with no restriction on use as a name, while "Black hair quartz" must not be used as a name (CIBJO Gemstone Book 2022 §4.2.4.4; CIBJO Gemmological Laboratories Book 2024 §7.2.1.203; GB/T 16552—2017 §5.1.1 c)).
Trade and mineralogical namesQuartz with dark needle-like inclusions is a trade name: inclusion/effect description. Standard and listing namesThe suggested listing name is quartz with black needle-like inclusions. The corresponding national-standard name in GB/T 16552—2017 Table A.1 is rutilated quartz, but the name itself is not listed in the original. Names in four languagesNames are given in Simplified Chinese, Traditional Chinese, English (expressed as Quartz with dark needle-like inclusions) and Japanese. Trade and mineralogical namesThe mineralogical name is quartz containing black needle-like inclusions, and the type of inclusion needs testing. Sub-names and unacceptable namesAmong trade names/synonyms, Tourmalinated quartz is used only once the inclusions are confirmed as tourmaline; Black hair quartz is a coined literal translation, kept as a search term only, and is not a usable name. Institution usageCIBJO Gemmological Laboratories Book 2024 lists this material item by item as Tourmalinated quartz; the wording of GIA, FTC, CIBJO and Gem-A for the English name is not yet verified by this site, and the entry's own English name is registered, which does not represent the position of those bodies; the wording used by GSJ (Japan) for the Japanese name is not yet verified by this site, and the entry's own Japanese name is registered.
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.
This table scrolls sideways on narrow screens.
| Name | Type | Matching | Use as a name | Basis |
|---|---|---|---|---|
| no restriction recorded (1) | ||||
| Tourmalinated quartzEnglish | market name | matched only once the condition is confirmed | no restriction recorded | editorial ruling (no clause cited) |
| not to be used as a name (1) | ||||
| Black hair quartzEnglish | market name | matched automatically | not to be used as a name | CIBJO Gemstone Book 2022 4.2.4.4; CIBJO Gemmological Laboratories Book 2024 §7.2.1.203; GB/T 16552—2017 5.1.1 c); Note: LumaLark’s own literal translation; kept for search only. |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- ブラックルチルクォーツ／トルマリンクォーツ (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)
- 发晶 (GB/T 16552—2017 Table A.1)
- Mineralogical name
- Quartz with black needle-like inclusions; inclusion species requires testing
- Trade names and synonyms
- Tourmalinated quartz (market name; conditional name)Not to be used as a name: Black hair quartz (market name)
Four-language names
- 简体中文
- 黑发晶
- 繁體中文
- 黑髮晶
- English
- Quartz with dark needle-like inclusions
- 日本語
- ブラックルチルクォーツ／トルマリンクォーツ
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Natural materials
- Material domain
- Natural inorganic gem materials
- Browsing family
- Quartz and chalcedony materials
- Identity tier
- Trade name: inclusion / visual-effect descriptor
- Mineral chemical class
- Silicates
- Construction or treatment status
- Natural identity; treatment status unknown
Treatments listed by standards
Quartz with dark needle-like inclusions is classified under GB/T 16552—2017 Annex B Table B.1 by this site applying the rock crystal row, as the standard does not give it a separate row: heat treatment is listed as an enhancement, irradiation is listed as an enhancement, filling is handled by grade, dyeing is listed as a treatment, and coating is listed as a treatment. The full row, including the effect column, is on the rock crystal page; the notes to Table B.1 and the definitions of the filling grades are on the treatments page.
GB/T 16552-2017, Annex B, Table B.1
Under the “Rock Crystal” row of Table B.1: Heating Optimization; Irradiation Optimization; Filling Graded — see §5.4.1, Table 1; Dyeing Treatment; Coating Treatment. The full row, with the effect column, is on the Rock Crystal 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.
What it is and how it's identified
Among the registered material facts for Quartz with dark needle-like inclusions, the composition (phase) is quartz; structural, durability, physical and optical items all take the values for rock crystal as a whole class and are not measurements of this material alone. Registered for rock crystal as a whole class: the overall structure is crystalline, trigonal, with a habit of hexagonal prisms with pronounced horizontal striations on the prism faces; Mohs hardness is 7 and cleavage is none; density is 2.64–2.69 g/cm³, with the limits derived from the cited clause's value of 2.66 and its tolerance of +0.03/−0.02; refractive index is 1.544–1.553 and birefringence 0.009; optical character is anisotropic, uniaxial positive, a bull's-eye interference figure may appear, and Brazil-law twinning is common in amethyst; in the untreated state, pleochroism is weak and varies with colour, and lustre is vitreous; among optical effects, chatoyancy can be seen, and asterism can be seen as six-rayed stars, mostly in rose quartz. Chemical composition, fluorescence, UV-visible spectrum, infrared spectrum and magnification are written in the cited clause for rock crystal as a whole class; see the Rock Crystal entry.
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 rock crystal (the whole class), so they are not repeated on the Quartz with dark needle-like inclusions page; see the material facts on the Rock Crystal entry.
Items below that name the class they cover give the cited clause’s value for that whole class, not a measurement of Quartz with dark needle-like inclusions (how to read class-level values).
Definition
Quartz with dark needle-like inclusions — composition (phase): quartz
CIBJO Gemmological Laboratories Book 2024
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Structure
Quartz with dark needle-like inclusions — structure (overall): crystalline
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — structure (crystal system): trigonal
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — structure (crystal habit): hexagonal prisms with prominent horizontal striations on the prism faces
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Durability
Quartz with dark needle-like inclusions — Mohs hardness: 7
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
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — cleavage: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Physical properties
Quartz with dark needle-like inclusions — density: 2.64–2.69 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
- Qualification
The clause we cite gives 2.66, with a stated tolerance of +0.03 / -0.02. The range shown here is worked out from that.
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Optical
Quartz with dark needle-like inclusions — optic character: anisotropic material, uniaxial, with positive optic character; a “Bull's eye” interference figure may be present, and Brazil-law twinning is common in amethyst.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — refractive index: 1.544–1.553
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — birefringence: 0.009
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — pleochroism: weak; it depends on the body colour.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — optical effect (chatoyancy): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quartz with dark needle-like inclusions — optical effect (asterism): seen; a six-rayed star, common in rose quartz.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
- CIBJO definitions
- chatoyancy, asterism
Quality factors
Quartz with dark needle-like inclusions — quality factor (lustre): vitreous
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- rock crystal (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.16 (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): 1.548 / 2.67; Closest values: 1Agate 1.537 / 2.63, 2Shoushan Stone 1.56 / 2.7, 3Changhua Stone 1.56 / 2.6, 4Bamboo Coral 1.57 / 2.65, 5Synthetic Beryl 1.57 / 2.69
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
Clause-level definitions
Quartz with dark needle-like inclusions has a direct definition in the CIBJO Gemmological Laboratories Book 2024 under the term Tourmalinated quartz, defined as mineral species quartz, mineral or gem variety rock crystal, trade name tourmalinated quartz, with the CIBJO wording quoted in full under Clause-level definitions on this page. The cross-check shows 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 |
|---|---|---|---|
| Tourmalinated quartz | 7.2.1.245 | Rock crystal containing visible tourmaline needles | 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
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 Quartz on this site: 74 entries listed by this site's parent-entry links; synthetic, treated and similar entries carry their recorded state after the name; this page (Quartz with dark needle-like inclusions) is marked.
- Quartz
Sub-entries (57)
- Agate
Sub-entries (1)
- Amethyst
- Ametrine
- Aventurine Quartz
- Aventurine Quartz / Green Aventurine
- Banded Agate
- Black Agate
- Bloodstone / Heliotrope
- Blue Lace Agate
- Carnelian
- Chalcedony
Sub-entries (2)
- Chrysoprase
- Citrine
- Clear Quartz / Rock Crystal
- Coated Quartz
- Colourless to White Quartz (brand name: Azeztulite)
- Crazy Lace Agate
- Dendritic Agate
- Dyed Agate (Treated: dyed)
- Elestial Quartz / Skeletal Quartz
- Eye Agate
- Flower Agate / Cherry Blossom Agate
- Green Quartz
- High-clarity quartz with golden needle-like inclusions
- Included Quartz
- Jasper
Sub-entries (1)
- Madeira Citrine
- Malachite Agate
- Morion / very dark Smoky Quartz
- Moss Agate
- Moss Chalcedony
- Multi-inclusion Quartz
- Onyx (banded chalcedony)
- Phantom Quartz
- Prase
- Prasiolite / Green Quartz
- Quartz Cat’s-eye
- Quartz claimed to be from the Himalayas
- Quartz Crystal
- Quartz with dark needle-like inclusions
- Quartz with fine fibrous inclusions
- Quartz with flower-like inclusions
- Quartz with golden needle-like inclusions
- Quartz with green needle-like inclusions
- Quartzite Jade
- Quartzose Jade
- Red Agate
- Rock Crystal
- Rose Quartz
- Rutilated Quartz
- Sard
- Sardonyx
- Silicified Asbestos
Sub-entries (2)
- Hawk’s Eye
- Tiger’s Eye
Sub-entries (1)
- Smoky Quartz
- Smoky Quartz (brown variety)
- Strawberry Quartz
- Yellow-green Quartz
- Agate
This table scrolls sideways on narrow screens.
| Page | Content | Status |
|---|---|---|
| Browsing family | Quartz and chalcedony materials | Live |
| Treatments recorded for this material | Heated / Heat-treated (via parent material), Irradiated (via parent material), Filled / Fracture-filled (via parent material), Dyed (via parent material), Coated (via parent material) | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Quartz with dark needle-like inclusions 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.