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Artificial products / Manufactured products · Artificial product type · Man-made glass
Man-made Black Goldstone Glass
Also known asGoldstone glass (conditional name)
A trade name for black man-made goldstone glass with metallic sparkles; it is not a natural stone, and the specific recipe requires supplier evidence. 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 Man-made Black Goldstone Glass forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- Hardness, density and refractive index of Man-made Black Goldstone GlassEach value with its source and check date
- Man-made Black Goldstone Glass 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 Man-made Black Goldstone GlassThe listing name to use; what must be disclosed before sale
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 gold stone' is a trade/market name, and the cited authoritative sources (CIBJO Gemstone Book 2022 and the relevant GIA pages) do not define its material attribution; on present authority it cannot be asserted whether it is glass, some other artificial stone or another material, nor can its manufacturing process be described. Under CIBJO naming principles an artificial product used in jewellery should be described by the name of the material it is composed of, or as 'imitation + imitated material name'; a trade name that conveys no material information (such as 'black gold stone') does not meet that requirement. This record therefore gives an identity boundary only: it is a market name whose material is pending testing.
Scope: Applies only to defining "hei jin shi" (black goldstone) as a man-made/market name of undetermined material; not to be used to assert its material composition or manufacturing process.
Sources CIBJO Gemstone Book 2022 · GIA Introduction to Imitation Gems
Where it forms
Natural occurrence environment does not apply: the natural setting of the material under this name is moot because the material itself is not established by authority.
Sources CIBJO Gemstone Book 2022
Manufacturing conditions undefined: the cited authorities do not describe the material or process behind 'black gold stone'.
Sources CIBJO Gemstone Book 2022 · GIA Introduction to Imitation Gems
How it forms, step by step
(Unknown) The cited authorities do not define what material 'black gold stone' is made from.
Sources CIBJO Gemstone Book 2022
(Unknown) The cited authorities give no manufacturing or assembly process for it.
Sources CIBJO Gemstone Book 2022
(Advisory) Per CIBJO naming principles, its material must first be determined, then disclosed truthfully by material name or as 'imitation + target name'.
Sources CIBJO Gemstone Book 2022
Link to appearance
As a market name 'black gold stone' denotes a material of a particular appearance, but the name itself does not state its substance; per CIBJO/GIA, appearance similarity is not sufficient to determine material and testing is required.
Sources CIBJO Gemstone Book 2022 · GIA Introduction to Imitation Gems
Timescale
The cited authorities give no timescale for this name or material.
Sources CIBJO Gemstone Book 2022
Other research findings
Under CIBJO an artificial product used in jewellery must be described by the name of the material it is composed of or as 'imitation + imitated material name'; a trade name carrying no material information (such as 'black gold stone') does not meet this requirement.
Evidence grade AScope: A naming rule used to note the compliance issue; it does not determine the material.
Sources CIBJO Gemstone Book 2022
CIBJO defines 'artificial stones' as artificial products used in jewellery or objets d'art that have no natural counterparts; even if 'black gold stone' belongs to this class, the name alone still does not state its manufacturing material.
Evidence grade AScope: A category definition stated conditionally; not an identification of this item.
Sources CIBJO Gemstone Book 2022
In CIBJO's terms, an imitation copies how a natural material looks while lacking that material's chemistry, physical properties and structure; accordingly, from the appearance name 'black gold stone' alone one can conclude neither that it is glass nor what it imitates.
Evidence grade AScope: Establishes that an appearance name is insufficient; gives no material conclusion.
Sources CIBJO Gemstone Book 2022
GIA notes that simulant/substitute materials can be natural or manmade and often differ in composition, structure and physical properties from what they imitate; hence a trade name alone cannot determine the material of 'black gold stone'.
Evidence grade AScope: A general principle supporting the undetermined-material conclusion; it names no specific material.
Sources GIA Introduction to Imitation Gems
Limits of this research
- Research status: Only partial material-specific findings found; gaps are stated as gaps
- The cited authorities do not define the material attribution or manufacturing process of 'black gold stone'; the actual material requires testing.
- This record does not assert 'black gold stone' to be glass or any specific material; common market practice is not an identification.
- 'Black gold stone' may denote different materials in different markets and must be tested per item.
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
- Man-made Black Goldstone glass
GB/T 16552—2017 5.1.1 c), 5.1.3.2 a)
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
"Man-made Black Goldstone Glass" is a market name rather than a mineral species name; before using it, verify: Not a mineral: man-made or non-mineral material.
What this means for you
Before buying, check the recommended listing name "Man-made Black Goldstone glass" 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
- Man-made Black Goldstone glass
VerifyNames, standards, technical facts, clauses and sources
Names
Besides Man-made Black Goldstone Glass, the name register records "Goldstone glass", for which no restriction on use as a name is recorded.
Standard and listing namesMan-made Black Goldstone Glass is not listed in GB/T 16552—2017; its GB/T naming counterpart is Glass, and the suggested listing name is Man-made Black Goldstone glass. Names in four languagesThe four-language names are the Simplified and Traditional Chinese names, English Man-made Black Goldstone Glass and the Japanese name; the entry carries its own Japanese name, but GSJ's wording for it is not yet verified by this site. Institution usageFor authority wording, the FTC and CIBJO texts on file have no wording for this name (checked), and GIA and Gem-A are unchecked; bodies without a recorded wording show the entry's own English name, Man-made Black Goldstone Glass, which does not represent their position. Candidate search termsGoldstone glass is recorded as an English market name, as a search candidate only, with no restriction recorded; related high-risk names include the Chinese trade names for blue goldstone and black goldstone. Trade and mineralogical namesThe mineralogical name refers to man-made aventurine glass with metallic sparkles; the specific inclusions and colourant formula require supplier evidence.
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) | ||||
| Goldstone glassEnglish | market name | search candidate only | no restriction recorded | editorial ruling (no clause cited); Note: Related high-risk names: “Blue Sandstone”, “Black Goldstone”. |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- ブラックゴールドストーン (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)
- 玻璃 (GB/T 16552—2017 §5.1.3.2 a))
- Mineralogical name
- Man-made aventurine glass with metallic sparkles; exact inclusion/colorant formulation requires supplier evidence
- Trade names and synonyms
- Goldstone glass (market name; conditional name)
Four-language names
- 简体中文
- 黑金石
- 繁體中文
- 黑金石
- English
- Man-made Black Goldstone Glass
- 日本語
- ブラックゴールドストーン
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Artificial products / Manufactured products
- Material domain
- Artificial products / Manufactured products
- Browsing family
- Man-made glass products
- Identity tier
- Artificial product type
- Mineral chemical class
- Not applicable
- Construction or treatment status
- Man-made glass
What it is and how it's identified
The material and identification facts for Black Goldstone Glass are registered from the clauses for man-made glass (the whole category), not values measured on black goldstone alone; category-wide features such as chemical composition, fluorescence, UV-Vis spectrum, infrared spectrum and magnification are given in the material facts of the glass entry and are not repeated on the black goldstone page. Values taken from man-made glass as a whole: amorphous structure, no cleavage, Mohs hardness 5–6, density 2.3–4.5 g/cm³; optically isotropic, commonly with anomalous optical behaviour, refractive index 1.47–1.7, no birefringence; when untreated, no pleochroism, and the quality factor lustre is vitreous; play-of-colour, iridescence, cat's-eye effect, star effect, aventurescence, colour-change effect and sheen are all registered as possible. Of these, the Mohs hardness and density are the usual values given by the cited clause, typical values rather than absolute limits; the refractive index is the overall clause value, and this site notes that the clause also has finer sub-ranges.
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 manufactured glass (whole class), so they are not repeated on the Man-made Black Goldstone Glass page; see the material facts on the Glass entry.
Items below that name the class they cover give the cited clause’s value for that whole class, not a measurement of Man-made Black Goldstone Glass (how to read class-level values).
Structure
Man-made Black Goldstone Glass — structure (overall): amorphous (not crystalline)
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Durability
Man-made Black Goldstone Glass — Mohs hardness: 5–6
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
- manufactured glass (whole class)
- Qualification
The clause we cite gives this as a typical value. It is a common value, not an absolute limit.
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — cleavage: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Physical properties
Man-made Black Goldstone Glass — density: 2.3–4.5 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
- Qualification
The clause we cite gives this as a typical value. It is a common value, not an absolute limit.
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Optical
Man-made Black Goldstone Glass — optic character: isotropic, commonly with anomalous optical behaviour
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — refractive index: 1.47–1.7
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
- General note
- the clause has finer ranges
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — birefringence: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — pleochroism: none
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (play of colour): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (iridescence): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (chatoyancy): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (asterism): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (aventurescence): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (colour change): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Man-made Black Goldstone Glass — optical effect (labradorescence): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
- CIBJO definitions
- play of colour, chatoyancy, asterism, aventurescence, colour change, labradorescence
Quality factors
Man-made Black Goldstone Glass — quality factor (lustre): vitreous
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- manufactured glass (whole class)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.20 (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): 1.585 / 3.4; Closest values: 1Hemimorphite 1.625 / 3.45, 2Imperial Topaz 1.623 / 3.53, 3Lazulite 1.627 / 3.12, 4Apatite 1.639 / 3.18, 5Synthetic Jadeite 1.66 / 3.34
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
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 | Man-made glass products | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Man-made Black Goldstone Glass 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. The entry exists so that buyers and sellers can check naming, disclosure and material facts item by item.