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Artificial products / Manufactured products · Artificial product type · Man-made glass
Man-made Blue Goldstone Glass
Also known asBlue sandstone (not to be used as a name)
A trade name for blue man-made goldstone glass with metallic sparkles; it has nothing to do with sandstone or natural stone, and is a highly misleading name. 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 Blue 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 Blue Goldstone GlassEach value with its source and check date
- Man-made Blue 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 Blue 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
'Blue sand 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 what material it is made of, 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 'blue sand 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 "lan sha shi" (blue 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 'blue sand 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 'blue sand 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 'blue sand stone' denotes a material of a particular appearance (often a sparkling blue look), 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 'blue sand 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 'blue sand 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 'blue sand 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 'blue sand 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 'blue sand stone'; the actual material requires testing.
- This record does not assert 'blue sand stone' to be glass or any specific material; common market practice is not an identification.
- 'Blue sand 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 Blue 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 Blue 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 Blue 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 Blue Goldstone glass
VerifyNames, standards, technical facts, clauses and sources
Names
For Man-made Blue Goldstone Glass, "Blue sandstone" must not be used as a name (CIBJO Gemstone Book 2022 §4.3.5.1; GB/T 16552—2017 §5.2.1 a); 16 CFR Part 23 §23.1).
Standard and listing namesThe Chinese standard naming counterpart for Man-made Blue Goldstone Glass is glass (GB/T 16552—2017), and the standard does not list this name itself; the suggested listing name is Man-made Blue Goldstone glass. Names in four languagesIt is written in Simplified Chinese, Traditional Chinese, English (Man-made Blue Goldstone Glass) and Japanese; the Japanese name is the entry's own, and the wording of Japan's GSJ for it is not yet verified by this site. Sub-names and unacceptable namesBlue sandstone is an English market name and also a misnomer, classed as an unusable name and kept only as a search term. Trade and mineralogical namesThe mineralogical name can be paraphrased as man-made blue aventurine glass with metallic sparkles; the exact inclusions and colouring formulation require evidence from the supplier. Institution usageOn 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, which does not represent their position.
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 |
|---|---|---|---|---|
| not to be used as a name (1) | ||||
| Blue sandstoneEnglish | market name | matched automatically | not to be used as a name | CIBJO Gemstone Book 2022 4.3.5.1; GB/T 16552—2017 5.2.1 a); 16 CFR Part 23 §23.1; Note: Misnomer; kept for search only. |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- ブルーゴールドストーン (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 blue aventurine glass with metallic sparkles; exact inclusion/colorant formulation requires supplier evidence
- Trade names and synonyms
- Not to be used as a name: Blue sandstone (market name)
Four-language names
- 简体中文
- 蓝砂石
- 繁體中文
- 藍砂石
- English
- Man-made Blue Goldstone Glass
- 日本語
- ブルーゴールドストーン
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 registered material facts for Man-made Blue Goldstone Glass are written in the cited clause for manufactured glass (the whole class); they are not measurements of Blue Goldstone Glass itself. For manufactured glass (the whole class): structure (overall) amorphous; Mohs hardness 5–6, cleavage none, density 2.3–4.5 g/cm³, the hardness and density being typical values, common readings rather than absolute limits; optic character isotropic, often with anomalous optical behaviour; refractive index 1.47–1.7, the register taking the overall value although the clause has finer sub-ranges; birefringence none. Untreated, pleochroism is none and the quality factor (lustre) is vitreous; play of colour, iridescence, chatoyancy, asterism, aventurescence, colour change and sheen are all visible. Chemical composition, luminescence, UV-visible spectrum, infrared spectrum and magnification are written for manufactured glass (the whole class); see the Glass 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 manufactured glass (whole class), so they are not repeated on the Man-made Blue 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 Blue Goldstone Glass (how to read class-level values).
Structure
Man-made Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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 Blue 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.