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Artificial products / Manufactured products · Artificial product type · Synthetic product
Synthetic Amethyst
Synthetically made purple quartz, the counterpart of natural Amethyst; GB/T 16552-2017 Annex A Table A.4 lists it as "synthetic amethyst". 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 Synthetic Amethyst forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- Hardness, density and refractive index of Synthetic AmethystEach value with its source and check date
- Synthetic Amethyst 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?
- Name origin and history of Synthetic AmethystHow people have used it
- Listing and disclosing Synthetic AmethystThe listing name to use; what must be disclosed before sale
- Standard clauses that define Synthetic AmethystWhich 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
Synthetic amethyst belongs to synthetic quartz — quartz grown artificially as a silicon dioxide single crystal — and represents its purple colour type, mirroring natural amethyst instead of arising through ore formation in nature. CIBJO treats any laboratory-grown stone as sharing its natural equivalent's structure, physical behaviour and chemical makeup in all essentials; accordingly synthetic amethyst is produced by artificial crystal growth and given its purple hue through doping plus irradiation/heat treatment. Because the parent substance is artificial, the label must spell out 'synthetic amethyst' and may never rely on the natural variety name on its own.
Scope: Applies to explaining the artificially manufactured nature of synthetic amethyst as the purple variety of synthetic quartz and its naming boundaries; does not describe the ore-forming process of natural amethyst.
Sources CIBJO Gemstone Book 2022 · G&G Summer 2014
Where it forms
A controlled laboratory crystal-growth environment: synthetic amethyst is a man-made colour variety, not a natural geological setting.
Sources CIBJO Gemstone Book 2022 · G&G Summer 2014
Natural amethyst occurrence settings (iron-bearing hydrothermal veins, geodes, pegmatites) do not apply; synthetic amethyst has no natural formation origin.
Sources CIBJO Gemstone Book 2022 · G&G Summer 2014
How it forms, step by step
Prepare the silicon dioxide feedstock and dope it with colouring elements (e.g. iron and irradiation-sensitive impurities).
Sources CIBJO Gemstone Book 2022
Grow a quartz crystal artificially under controlled laboratory conditions.
Sources CIBJO Gemstone Book 2022
Apply irradiation or heat treatment so that the crystal takes on the purple (amethyst) colour.
Sources CIBJO Gemstone Book 2022
Cut and polish the material and name/disclose it as 'synthetic amethyst'.
Sources CIBJO Gemstone Book 2022
Link to appearance
Synthetic amethyst shares the composition and structure of natural amethyst, so its appearance can be very similar; its purple colour is obtained by doping and irradiation/heat treatment, and its colour zoning direction may differ from natural material.
Sources CIBJO Gemstone Book 2022 · G&G Summer 2014
Timescale
The selected sources give no crystal-growth duration; they only record that gem-quality synthetic ametrine (synthetic quartz) entered the market from 1994 onward.
Sources G&G Summer 2014
Related base materials
- Synthetic quartz: parent-synthetic-material | Synthetic amethyst is the purple variety of synthetic quartz corresponding to the colour of natural amethyst; its parent material is man-made
Supporting findings
Synthetic amethyst is manufactured by artificial crystal growth as a variety of synthetic quartz; CIBJO lists synthetic amethyst among the commercially available examples of synthetic stones.
Evidence grade AScope: States that it is synthesised and commercially available; not the specific growth parameters.
Sources CIBJO Gemstone Book 2022
Human use and museum objects
Gem-quality synthetic ametrine (containing amethyst-coloured zones, a synthetic quartz material) entered the market from Russia beginning in 1994.
Evidence grade AScope: Records the market-introduction date of the related synthetic quartz variety.
Other research findings
Synthetic amethyst is the purple variety of synthetic quartz corresponding to natural amethyst; it has essentially the same chemical composition and structure as natural amethyst and is an artificial product.
Evidence grade AScope: Defines its identity and technical standing; not the genesis of natural amethyst.
Sources CIBJO Gemstone Book 2022
Synthetic and natural quartz differ in the orientation of the amethyst-citrine colour boundary (roughly parallel to the optic axis in natural material, oblique in synthetic), which helps separate synthetic from natural quartz-type material.
Evidence grade AScope: Evidence from a synthetic ametrine study, specific to purple-zoned synthetic quartz.
Limits of this research
- Research status: Formation, occurrence or other material-specific findings found in authoritative sources
- The selected sources give no specific growth method or temperature, pressure and duration parameters for synthetic amethyst.
- Within this source set, synthetic amethyst is documented via CIBJO naming/classification clauses and a synthetic ametrine study; no growth-specific literature on synthetic amethyst itself is included.
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
- Synthetic Amethyst
GB/T 16552—2017 Table A.4 “Synthetic Amethyst” · CIBJO Gemstone Book 2022 4.3.3.1
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
"Synthetic Amethyst" is a market name rather than a mineral species name; before using it, verify: Not a mineral: man-made or non-mineral material.
Evidence
- GB/T · Table A.4, row 合成紫晶 (Synthetic Amethyst)
What this means for you
Before buying, check the recommended listing name "Synthetic Amethyst" 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
- Not a mineral: man-made or non-mineral material.
- Suggested listing name
- Synthetic Amethyst
VerifyNames, standards, technical facts, clauses and sources
Names
Standard and listing namesThe Chinese formal name for Synthetic Amethyst comes from GB/T 16552—2017 Table A.4, and the suggested listing name is Synthetic Amethyst. Names in four languagesNames are given in four languages: Simplified Chinese, Traditional Chinese, English (Synthetic Amethyst) and Japanese (meaning synthetic amethyst). Trade and mineralogical namesThe mineralogical name means synthetic purple quartz corresponding to natural amethyst. Institution usageOn authority wording, among GIA, FTC, CIBJO and Gem-A, the FTC text on file has no wording for this name (checked); GIA, CIBJO and Gem-A wording is unchecked by this site, and bodies without a recorded wording show the entry's own English name Synthetic Amethyst, which does not represent their position. Japanese namesThe Japanese name is the entry's own Japanese name, and Japan's GSJ wording for it is not yet verified by this site.
- GSJ (Japan) formal name
- 合成アメシスト (not yet checked for this body — the entry's own Japanese name is shown)
- Chinese formal name
- 合成紫晶 (GB/T 16552—2017 Table A.4)
- Mineralogical name
- Synthetic purple quartz corresponding to amethyst
Four-language names
- 简体中文
- 合成紫晶
- 繁體中文
- 合成紫晶
- English
- Synthetic Amethyst
- 日本語
- 合成アメシスト
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Artificial products / Manufactured products
- Material domain
- Artificial products / Manufactured products
- Browsing family
- Synthetic gem products
- Identity tier
- Artificial product type
- Mineral chemical class
- Mixed / composition-dependent
- Construction or treatment status
- Synthetic product
What it is and how it's identified
All registered material facts for Synthetic Amethyst are taken from the cited clause values for "synthetic quartz (the whole class)", not measured on Synthetic Amethyst alone; whole-class features such as chemical composition, long-wave and short-wave UV fluorescence, UV-visible spectrum, infrared spectrum and magnification are recorded on the Synthetic Quartz entry. Under the clause for "synthetic quartz (the whole class)", Synthetic Amethyst is crystalline, trigonal, with hexagonal tabular-prismatic crystals whose faces often show a "cobblestone" texture; Mohs hardness 7; cleavage none; density 2.64–2.69 g/cm³; the site note explains that the cited clause gives a density value of 2.66 with a permitted tolerance of +0.03/−0.02, from which the range is derived. Under the clause for "synthetic quartz (the whole class)", Synthetic Amethyst is anisotropic, uniaxial, positive, with refractive index 1.544–1.553 and birefringence 0.009; untreated Synthetic Amethyst has weak pleochroism varying with colour, and vitreous lustre.
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, long-wave UV luminescence, short-wave UV luminescence, UV-visible spectrum, infrared spectrum, magnification: these whole-class features are given in the cited clause for synthetic quartz (the whole class), so they are not repeated on the Synthetic Amethyst page; see the material facts on the Synthetic Quartz entry.
Items below that name the class they cover give the cited clause’s value for that whole class, not a measurement of Synthetic Amethyst (how to read class-level values).
Structure
Synthetic Amethyst — structure (overall): crystalline
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Synthetic Amethyst — structure (crystal system): trigonal
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Synthetic Amethyst — structure (crystal habit): flat hexagonal prisms; faces usually show a cobblestone-like texture.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Durability
Synthetic Amethyst — 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
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Synthetic Amethyst — cleavage: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Physical properties
Synthetic Amethyst — density: 2.64–2.69 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (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): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Optical
Synthetic Amethyst — optic character: uniaxial, optically positive (anisotropic)
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Synthetic Amethyst — refractive index: 1.544–1.553
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Synthetic Amethyst — birefringence: 0.009
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Synthetic Amethyst — 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
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quality factors
Synthetic Amethyst — quality factor (lustre): vitreous
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- synthetic quartz (the whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.10 (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
At the clause level, Synthetic Amethyst is registered under the term Synthetic Amethyst, based on GB/T 16552—2017 Annex A, which defines it as synthetic violet quartz corresponding to amethyst. The cross-check shows it is listed directly by GB/T, and CIBJO carries no standalone entry under the same name.
This table scrolls sideways on narrow screens.
| Term | Clause | Definition | Cross-check |
|---|---|---|---|
| Synthetic Amethyst | GB/T 16552-2017 Annex A | Synthetic purple quartz corresponding to amethyst | Listed directly by GB/T; CIBJO carries no standalone entry under the same name. |
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.
- Federal Trade Commission (United States). In the Loupe: Advertising Diamond, Gemstones and Pearls.
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.
This table scrolls sideways on narrow screens.
| Page | Content | Status |
|---|---|---|
| Browsing family | Synthetic gem products | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Synthetic Amethyst 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.