On this page
UnderstandWhat it is, what people ask, how far this page goes
Natural inorganic gem materials · Trade name: colour / appearance variety · Natural identity; treatment status unknown
Canary Tourmaline
A trade variety name for bright yellow tourmaline; there is no unified colour-grading standard, and the cause of colour and any treatment must be determined by testing. 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 Canary Tourmaline forms and what gives its colourFormation setting, process and timescale; where its colour and optical effects come from, each finding graded and sourced
- How to identify Canary TourmalineHow far lab testing can go and whether a synthetic exists
- Treatments and enhancements of Canary Tourmaline1 registered treatments: status, stability, how common they are and identification leads
- Caring for and wearing Canary TourmalineCleaning, heat, chemicals and light, as the cited sources give them
- Hardness, density and refractive index of Canary TourmalineEach value with its source and check date
- Canary Tourmaline in English, Chinese and Japanese; national standard namesNames in four languages, the GB/T standard name and the suggested listing name; and: Which of GIA, FTC, CIBJO and Gem-A have a name for it on record, and do those agree?
- Listing and disclosing Canary TourmalineThe listing name to use; what must be disclosed before sale
- Standard clauses that define Canary TourmalineWhich 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
Canary tourmaline is a commercial name for bright yellow tourmaline; the cited sources give no authoritative mineralogical definition, so it is treated as a trade name with its evidence downgraded to C. Yellow in tourmaline has several causes: some bright yellow dravite–uvite mixtures (called “savannah” tourmaline) are coloured by iron, and some pink and yellow elbaites may owe their hue to radiation-induced (natural or laboratory) colour centres. The parent material forms, like other tourmaline, in granite-bearing pegmatites; canary tourmaline itself has no independent genesis.
Scope: Applies only as background on a trade name for bright yellow tourmaline; as there is no authoritative definition, it cannot serve as a basis for identification or origin, and the cause of yellow colour cannot be generalised.
Sources GIA Tourmaline Description
Where it forms
Granite-bearing pegmatites (which also host bright yellow dravite–uvite mixtures).
Sources GIA Tourmaline Description
How it forms, step by step
The pegmatite's residual fluid crystallises and tourmaline grows.
Sources GIA Tourmaline Description
In bright yellow dravite–uvite mixtures iron enters the lattice to colour the stone; some pink/yellow elbaite is instead coloured by radiation-induced colour centres.
Sources GIA Tourmaline Description
“Canary” is a market label for the bright yellow colour; it does not change the mineral identity nor correspond to an independent genesis.
Sources GIA Tourmaline Description
Link to appearance
Bright yellow may come from iron (e.g. “savannah” tourmaline) or from radiation colour centres (some pink/yellow elbaite); colour alone cannot fix the chromophore of a “canary” stone.
Sources GIA Tourmaline Description
Timescale
The cited sources give no absolute timescale for canary tourmaline formation.
Sources GIA Tourmaline Description
Related base materials
- Tourmaline group (elbaite, or dravite–uvite): trade name for bright yellow tourmaline
Recorded localities
Authoritative sources name a single or principal locality.
Africa
- Canary mining area, Lundazi District, Eastern Province, ZambiaStated as the most important source, not the only one; mined since 1983
Sources Gems & Gemology Winter 2007
These are localities recorded by authoritative sources, not an origin finding for any individual piece. The CIBJO Gemstone Book (2022, §4.2.3) says a place of origin names where a gem was mined or harvested, is a matter of opinion, does not imply a level of quality, and that cutting, processing or exporting centres must not be used to imply origin. See how far testing can go on this page, the origin determination guide and the overview of recorded localities.
Causes of colour and optical effects
Some bright yellow dravite–uvite mixtures (called “savannah” tourmaline) are coloured by iron.
Evidence grade AScope: Concerns the specific “savannah” yellow group; it does not cover all yellow tourmaline and is not specific to “canary”.
Sources GIA Tourmaline Description
Some pink and yellow elbaites may owe their hue to natural or laboratory-induced radiation colour centres.
Evidence grade AScope: A possibility statement (the source uses “might”), not quantified and not specific to the bright-yellow trade name.
Sources GIA Tourmaline Description
Synthesis: bright yellow in tourmaline may arise from iron colouring or from radiation colour centres, both in pegmatites; canary tourmaline has no independent genesis and its evidence is only commercial-usage context.
Evidence grade CScope: “Canary” is undefined; this synthesis is background only and cannot replace laboratory testing.
Sources GIA Tourmaline Description
Other research findings
Canary tourmaline is a commercial name for bright yellow tourmaline, and the cited sources give no authoritative mineralogical definition for it.
Evidence grade CScope: The term has no authoritative definition and is a trade name only; it must not be used as a basis for identification, origin, or quality.
Sources GIA Tourmaline Description
Limits of this research
- Research status: Only partial material-specific findings found; gaps are stated as gaps
- No authoritative definition of “canary tourmaline” has been found, so its evidence is downgraded to C; it is only a commercial/colour name.
- The cited sources give no absolute timescale for canary tourmaline formation.
- No quantitative data on the distribution of yellow-colouring mechanisms (iron vs. radiation centres) are given.
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
- Canary Tourmaline (bright yellow tourmaline)
16 CFR Part 23 §23.24
Construction or treatment status
Natural identity; treatment status unknown
Treatments recorded for this material: Heated / Heat-treated (via parent material), Filled / Fracture-filled (via parent material), Dyed (via parent material), Irradiated (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
"Canary Tourmaline" is a market name rather than a mineral species name; before using it, verify: Trade name rather than a mineralogical species name.
Evidence
What this means for you
Before buying, check the recommended listing name "Canary Tourmaline (bright yellow tourmaline)" 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
- Canary Tourmaline (bright yellow tourmaline)
Care and wear
The item-by-item care advice that the GIA Care and Cleaning Guide gives for the whole class, and so for Canary Tourmaline, is set out in full under care on the Tourmaline entry.
Care
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
Treatments and identification leads
Values not givenThe treatment recorded for Canary Tourmaline is heat treatment, with status treated, stability stable and prevalence “almost always”; the identification leads and source for heat treatment are both shown as “—”, meaning the cited source gives no value, not “none”. Identification cluesThe identification leads also record that no synthetic counterpart of Canary Tourmaline is available on the market.
This table scrolls sideways on narrow screens.
| Treatment | Market frequency (CIBJO) | Stability (CIBJO) | GB/T 16552 category | JJA/AGL listing | Identification leads |
|---|---|---|---|---|---|
| heatingStatus: treated | almost always | stable | Optimization | — | — |
| Filling | — | — | Graded — see §5.4.1, Table 1 | — | — |
| Dyeing | — | — | Treatment | — | — |
| Irradiation | — | — | Treatment | — | — |
| Coating | — | — | Treatment | — | — |
Where each treatment acts (schematics): Heated / Heat-treated
“—” means the cited source gives no value for that item, not “none”. Source: CIBJO Gemstone Book 2022; GB/T 16552—2017 Table B.1 (row for Tourmaline)
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
What this table covers
What this page can give
- Registered treatments, their stability and how often they occur (see the table above)
- Identification leads for each treatment, for use when sending a stone for testing
VerifyNames, standards, technical facts, clauses and sources
Names
Chinese standard nameUnder GB/T 16552—2017 Table A.1, the national-standard name corresponding to Canary Tourmaline is tourmaline; the name Canary Tourmaline itself is not listed in the original, and its identity level is trade name: colour/appearance variety. Names in four languagesNames are given in Simplified Chinese, Traditional Chinese, English (Canary Tourmaline) and Japanese; the Japanese name is the entry's own, and the wording used by GSJ (Japan) for this name is not yet verified by this site. Trade and mineralogical namesThe mineralogical name is registered as a bright yellow tourmaline trade variety. Recommended listing nameThe suggested listing name is bright yellow tourmaline (Canary Tourmaline). Institution usageOn authority wording, CIBJO Gemmological Laboratories Book 2024 includes Canary Tourmaline; the FTC text contains no wording for this name (checked); GIA and Gem-A are unchecked, and bodies without a recorded wording show the entry's own English name for Canary Tourmaline, which does not represent the position of those bodies.
- GSJ (Japan) formal name
- カナリア・トルマリン (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)
- 碧玺 (GB/T 16552—2017 Table A.1)
- Mineralogical name
- Bright yellow tourmaline trade variety
Four-language names
- 简体中文
- 金丝雀碧玺
- 繁體中文
- 金絲雀碧璽
- English
- Canary Tourmaline
- 日本語
- カナリア・トルマリン
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Natural materials
- Material domain
- Natural inorganic gem materials
- Browsing family
- Tourmaline-supergroup minerals and gem varieties
- Identity tier
- Trade name: colour / appearance variety
- Mineral chemical class
- Silicates
- Construction or treatment status
- Natural identity; treatment status unknown
Treatments listed by standards
GB/T Table B.1The treatments for Canary Tourmaline are listed by this site by applying the tourmaline row of GB/T 16552—2017 Annex B Table B.1: heat treatment is listed as an enhancement; the grade definitions for filling are on the treatments page; dyeing is listed as a treatment; irradiation is listed as a treatment; coating is listed as a treatment. These treatments come from the tourmaline row, not from a treatment row the standard registers separately for canary tourmaline. See alsoThe notes to Table B.1 are on the treatments page, and the full row, including the effect column, is on the tourmaline page.
GB/T 16552-2017, Annex B, Table B.1
Under the “Tourmaline” row of Table B.1: Heating Optimization; Filling Graded — see §5.4.1, Table 1; Dyeing Treatment; Irradiation Treatment; Coating Treatment. The full row, with the effect column, is on the Tourmaline 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 material facts for Canary Tourmaline, the items marked as taking values for tourmaline (the whole mineral group) are written for that class; they are not measurements of Canary Tourmaline itself. For tourmaline (the whole mineral group): structure crystalline, trigonal; Mohs hardness 7–8, cleavage none; density 2.46–3.26 g/cm³, derived from the clause value of 3.06 with tolerances of +0.20 and −0.60; refractive index 1.615–1.655, derived from the clause value of 1.624–1.644 with tolerances of +0.011 and −0.009; birefringence 0.018–0.04, the overall value although the clause has finer sub-ranges; optic character anisotropic, uniaxial, negative; untreated, pleochroism moderate to strong, in different depths of body colour, and untreated, lustre vitreous. Canary Tourmaline is transparent, with a body colour of yellowish green to yellow, orange and brown, treatment state untreated; this site notes that colour descriptions for other entries in chapter 7 of the CIBJO Gemmological Laboratories Book also mention green or a greenish tint.
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”.
Luminescence, UV-visible spectrum, infrared spectrum, magnification: these whole-class features are given in the cited clause for tourmaline (the whole mineral group), so they are not repeated on the Canary Tourmaline page; see the material facts on the Tourmaline entry.
Items below that name the class they cover give the cited clause’s value for that whole class, not a measurement of Canary Tourmaline (how to read class-level values).
Structure
Canary Tourmaline — structure (overall): crystalline
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Canary Tourmaline — structure (crystal system): trigonal
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Canary Tourmaline — structure (crystal habit): rounded trigonal prisms or more complex ditrigonal prism-and-pyramid combinations; the crystal faces are distinctly striated lengthwise.
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Durability
Canary Tourmaline — Mohs hardness: 7–8
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
- tourmaline (the whole mineral group)
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Canary Tourmaline — cleavage: none
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
For Canary Tourmaline, the stability of heating is “stable”.
CIBJO Gemstone Book 2022
- Treatment state
- treated
- Treatment
- heating
- Qualification
This says how well the treatment holds up, not how durable Canary Tourmaline itself is.
- General note
- no durability verdict here
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Physical properties
Canary Tourmaline — density: 2.46–3.26 g/cm³
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
- Qualification
The clause we cite gives 3.06, with a stated tolerance of +0.20 / -0.60. The range shown here is worked out from that.
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Optical
Canary Tourmaline — optic character: uniaxial, optically negative (anisotropic)
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Canary Tourmaline — refractive index: 1.615–1.655
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
- Qualification
The clause we cite gives 1.624–1.644, with a stated tolerance of +0.011 / -0.009. The range shown here is worked out from that.
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Canary Tourmaline — birefringence: 0.018–0.04
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
- General note
- the clause has finer ranges
Source & check 2026-09-21
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-21)
- Fact checked on
- 2026-09-21
Canary Tourmaline — transparency: transparent.
CIBJO Gemmological Laboratories Book 2024
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Canary Tourmaline — pleochroism: moderate to strong, in lighter and deeper shades of the body colour.
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Canary Tourmaline — optical effect (chatoyancy): seen
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Canary Tourmaline — optical effect (colour change): seen; rare
GB/T 16553—2017
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (locator checked 2026-09-26)
- Fact checked on
- 2026-09-26
Canary Tourmaline — body colour: Yellow-green to yellow, orange and brown.
CIBJO Gemmological Laboratories Book 2024
- Treatment state
- untreated
- Qualification
In chapter 7 of the CIBJO Gemmological Laboratories Book, the colour descriptions of Andalusite, Mali Garnet, Sphalerite and other entries also name green or a greenish colour.
- General note
- colour alone is not identity
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
- CIBJO definitions
- chatoyancy, colour change
Quality factors
Canary Tourmaline — quality factor (lustre): vitreous
GB/T 16553—2017
- Treatment state
- untreated
- Does this standard apply
- applies to this entry
- What this covers
- tourmaline (the whole mineral group)
Source & check 2026-09-26
- Source
- GB/T 16553—2017 Gems — Testing (GB/T): §5.1.10 (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): 1.635 / 2.86; Closest values: 1Prehnite 1.625 / 2.88, 2Larimar 1.62 / 2.82, 3Datolite 1.646 / 2.95, 4Danburite 1.633 / 3, 5Sugilite 1.61 / 2.77
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
Testing and market
In the CIBJO laboratory protocol, Canary Tourmaline is covered under Tourmaline: for identification see the Tourmaline entry, and the list of required tests is on the laboratory testing page. No synthetic counterpart of Canary Tourmaline is available on the market. For Canary Tourmaline in trade, the reported frequency of heating is almost always; the treatment concerned is heating, and the treatment state is treated.
The CIBJO laboratory protocol covers Canary Tourmaline under “Tourmaline” (§6.1.86): see identification on the Tourmaline entry; the required tests are listed on the CIBJO laboratory protocol table for Tourmaline.
How far testing can go
Canary Tourmaline — synthetic counterpart on the market: No synthetic counterpart of this material is commercially available
CIBJO Gemstone Book 2022
- Treatment state
- any treatment state
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
For Canary Tourmaline in trade, the reported frequency of heating is “almost always”.
CIBJO Gemstone Book 2022
- Treatment state
- treated
- Treatment
- heating
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
Clause-level definitions
Canary Tourmaline has a direct definition in the CIBJO Gemmological Laboratories Book 2024 under the term Canary tourmaline: a yellowish-green to yellow, orange and brown, transparent, manganese-rich fluor-elbaite. The cross-check result is that it is defined directly by CIBJO; 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 |
|---|---|---|---|
| Canary tourmaline | 7.2.1.39 | Yellow-green to yellow, orange and brown, transparent Mn-rich fluor-elbaite | 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
- 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.
- GIA – Gemological Institute of America (United States). Gem Encyclopedia.
- Gem-A – The Gemmological Association of Great Britain (United Kingdom).
- eCFR (United States). 16 CFR § 23.24 — Disclosure of treatments to gemstones. In: 16 CFR Part 23 — Guides for the Jewelry, Precious Metals, and Pewter Industries.
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 Tourmaline on this site: 12 entries listed by this site's parent-entry links; synthetic, treated and similar entries carry their recorded state after the name; this page (Canary Tourmaline) is marked.
This table scrolls sideways on narrow screens.
| Page | Content | Status |
|---|---|---|
| Browsing family | Tourmaline-supergroup minerals and gem varieties | Live |
| Treatments recorded for this material | Heated / Heat-treated (via parent material), Filled / Fracture-filled (via parent material), Dyed (via parent material), Irradiated (via parent material), Coated (via parent material) | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Canary Tourmaline 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.