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Artificial products / Manufactured products · Artificial product type · Synthetic product
Synthetic Rutile
Synthetically made rutile; GB/T 16552-2017 Annex A Table A.4 lists it as "synthetic rutile", and the word "synthetic" must not be dropped from the 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 Synthetic Rutile forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- Caring for and wearing Synthetic RutileCleaning, heat, chemicals and light, as the cited sources give them
- Hardness, density and refractive index of Synthetic RutileEach value with its source and check date
- Synthetic Rutile 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 Synthetic RutileThe listing name to use; what must be disclosed before sale
- Standard clauses that define Synthetic RutileWhich 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 rutile is titanium dioxide (TiO2) produced by humans — treated under CIBJO definitions as a synthetic stone/simulant material rather than naturally formed rutile. Its manufacture began in the late 1940s via the flame-fusion technique; undoped it is almost colourless with a faint yellow tinge, and doping during growth yields many colours. It served as an early diamond simulant. CIBJO defines an imitation as an artificial product that copies a natural material's appearance without sharing its chemical makeup, physical properties or structure, and it must be honestly labelled 'synthetic rutile'.
Scope: Applies to explaining the artificially manufactured nature of synthetic rutile (flame fusion), its identity as a diamond simulant and its naming boundaries; does not describe the ore-forming process of natural rutile.
Sources GIA Introduction to Imitation Gems · CIBJO Gemstone Book 2022
Where it forms
A controlled laboratory crystal-growth environment (flame-fusion melt growth), not a natural geological setting.
Sources GIA Introduction to Imitation Gems · CIBJO Gemstone Book 2022
Natural rutile occurrence settings (e.g. metamorphic rocks, placers) do not apply; synthetic rutile has no natural formation origin.
Sources GIA Introduction to Imitation Gems · CIBJO Gemstone Book 2022
How it forms, step by step
Prepare the titanium dioxide feedstock.
Sources GIA Introduction to Imitation Gems
Use the flame-fusion method to melt the powdered feedstock and crystallise it.
Sources GIA Introduction to Imitation Gems
Produce different colours by doping (adding chemicals during the growth process).
Sources GIA Introduction to Imitation Gems
Cut, polish and name/disclose the material as 'synthetic rutile'.
Sources GIA Introduction to Imitation Gems
Link to appearance
Synthetic rutile is nearly colorless with a slight yellowish tint and can resemble diamond in appearance, which is why it served as an early diamond simulant; it can also be doped to show a variety of colours.
Sources GIA Introduction to Imitation Gems
Timescale
The source records that synthetic rutile was introduced in the late 1940s as an early diamond simulant; the growth duration itself is not quantified.
Sources GIA Introduction to Imitation Gems · CIBJO Gemstone Book 2022
Supporting findings
Production of synthetic rutile began in the late 1940s, using the flame-fusion technique.
Evidence grade AScope: Describes its introduction date and principal manufacturing method; not other possible synthesis routes.
Sources GIA Introduction to Imitation Gems
Other research findings
Depending on doping during growth, synthetic rutile can take on many colours; in its undoped form it is almost colourless, tinged faintly yellow.
Evidence grade AScope: Describes colour and doping-based colouring; not the specific dopant elements.
Sources GIA Introduction to Imitation Gems
Synthetic rutile was used as an early diamond simulant; it differs from diamond and other natural gems in chemical composition, crystal structure and optical/physical properties, and can be compared against diamond for identification.
Evidence grade AScope: Defines its simulant standing and technical grounds for differing from diamond; makes no value judgement.
Sources GIA Introduction to Imitation Gems
Under CIBJO an imitation is an artificial product that imitates the appearance of natural material without its chemical composition, physical properties or structure; synthetic rutile must be truthfully named/disclosed.
Evidence grade AScope: A classification/naming rule; not a specific growth process.
Sources CIBJO Gemstone Book 2022
Limits of this research
- Research status: Formation, occurrence or other material-specific findings found in authoritative sources
- The selected sources give no growth temperature, duration or equipment parameters for synthetic rutile, and do not quantify its optical constants.
- The selected sources only outline synthetic rutile as a diamond simulant and do not systematically list all of its gemological properties.
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 Rutile
GB/T 16552—2017 Table A.4 “Synthetic Rutile” · 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 Rutile" 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 合成金红石 (Synthetic Rutile)
What this means for you
Before buying, check the recommended listing name "Synthetic Rutile" 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 Rutile
Care and wear
Care
Synthetic Rutile — care (cleaning): GIA's 4Cs blog says synthetic rutile should be kept out of ultrasonic and steam cleaners.
GIA 4Cs blog (2016)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA 4Cs blog, “What Are Simulated Diamonds?” (2016-12-20): Section: main text (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
Synthetic Rutile — care (wear): the same entry notes that synthetic rutile, at Mohs 6 to 6.5, scratches rather easily and often shows rounded facet edges.
GIA 4Cs blog (2016)
- Treatment state
- any treatment state
Source & check 2026-10-06
- Source
- GIA 4Cs blog, “What Are Simulated Diamonds?” (2016-12-20): Section: main text (locator checked 2026-10-06)
- Fact checked on
- 2026-10-06
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
Each question links to the matching entries on this page; whether they answer it fully, go by the entry wording.
This table scrolls sideways on narrow screens.
| Question | Matching entries |
|---|---|
| Can it go in an ultrasonic or steam cleaner? | GIA's 4Cs blog says synthetic rutile should be kept out of ultrasonic and steam cleaners |
| Wearing limits (knocks, settings) | the same entry notes that synthetic rutile, at Mohs 6 to 6.5, scratches rather easily and often shows rounded facet edges |
VerifyNames, standards, technical facts, clauses and sources
Names
Standard and listing namesThe Chinese formal name for Synthetic Rutile comes from GB/T 16552—2017 Table A.4, and the suggested listing name is likewise Synthetic Rutile; the mineralogical name is Synthetic rutile. Names in four languagesNames are given in four languages: Simplified Chinese, Traditional Chinese, English (Synthetic Rutile) and Japanese (meaning synthetic rutile); that Japanese form is the entry's own Japanese name, and Japan's GSJ wording for it is not yet verified by this site. 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 Synthetic Rutile, which does not represent their position.
- GSJ (Japan) formal name
- 合成ルチル (not yet checked for this body — the entry's own Japanese name is shown)
- Chinese formal name
- 合成金红石 (GB/T 16552—2017 Table A.4)
- Mineralogical name
- Synthetic rutile
Four-language names
- 简体中文
- 合成金红石
- 繁體中文
- 合成金紅石
- English
- Synthetic Rutile
- 日本語
- 合成ルチル
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
Synthetic Rutile is registered from GB/T 16553—2017: composition TiO2, crystalline, tetragonal; Mohs hardness 6–7, cleavage imperfect; density 4.23–4.29 g/cm³, where the cited clause gives 4.26 with a permitted tolerance of +0.03/−0.03 and the range is derived from this. Optically, optical character anisotropic, uniaxial, positive; refractive index 2.616–2.903; birefringence 0.287; dispersion 0.33. With treatment status untreated, pleochroism is weak in light yellow stones, light yellow and colourless; luminescence none; magnification shows pronounced doubling (high birefringence), usually clean, occasionally with gas bubbles; lustre subadamantine to submetallic. The site also notes that hardness alone is not enough to judge durability.
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”.
Definition
Synthetic Rutile — composition (chemistry): TiO2
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Structure
Synthetic Rutile — structure (overall): crystalline
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — structure (crystal system): tetragonal
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — structure (crystal habit): blocky
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Durability
Synthetic Rutile — Mohs hardness: 6–7
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
- General note
- hardness only, not durability
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — cleavage: imperfect
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Physical properties
Synthetic Rutile — density: 4.23–4.29 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- Qualification
The clause we cite gives 4.26, with a stated tolerance of +0.03 / -0.03. The range shown here is worked out from that.
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Optical
Synthetic Rutile — optic character: uniaxial, optically positive (anisotropic)
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — refractive index: 2.616–2.903
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — birefringence: 0.287
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — dispersion: 0.33
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — pleochroism: in light yellow material, weak: light yellow and colourless.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — fluorescence (overall): none
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — spectrum (UV-visible): yellow, blue: 430 nm full absorption below.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — spectrum (infrared): The fingerprint part of the mid-IR spectrum shows the bands typical of rutile; in the functional group region, the bands differ from those of natural rutile.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
Source & check 2026-09-22
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-22)
- Fact checked on
- 2026-09-22
Synthetic Rutile — magnification: pronounced doubling (high birefringence), generally clean, occasional bubbles.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Synthetic Rutile — body colour: light yellow, though blue, blue-green, orange and other colours also occur.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- Qualification
In chapter 5 of GB/T 16553—2017, the colour entries of Celestite / Celestine, Emerald, Euclase and other variety clauses also name yellow or a yellowish colour.
- General note
- colour alone is not identity
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Quality factors
Synthetic Rutile — quality factor (lustre): submetallic to subadamantine
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.4.11 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
This material (RI / SG midpoints): 2.76 / 4.26; Closest values: 1Synthetic Moissanite 2.67 / 3.22, 2Hematite 3.045 / 5.12, 3Diamond 2.417 / 3.52, 4Artificial Strontium Titanate 2.409 / 5.13, 5Sphalerite 2.369 / 4
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 Rutile is registered under the term Synthetic Rutile, based on GB/T 16552-2017 Annex A, with the definition Synthetic rutile. 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 Rutile | GB/T 16552-2017 Annex A | Synthetic rutile | 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 Rutile 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.