On this page
UnderstandWhat it is, what people ask, how far this page goes
Natural inorganic gem materials · Mineral species · Natural identity; treatment status unknown
Azurite
Also known asChessylite
A basic copper carbonate mineral species with formula Cu3(CO3)2(OH)2; its Chinese name comes from its blue colour. 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 Azurite forms and what gives its colourFormation setting, process and timescale, each finding graded and sourced
- How to identify AzuriteHow far lab testing can go and whether a synthetic exists
- Treatments and enhancements of Azurite2 registered treatments: status, stability, how common they are and identification leads
- Caring for and wearing AzuriteCleaning, heat, chemicals and light, as the cited sources give them; durability indicators and wearing advice
- Hardness of AzuriteEach value with its source and check date
- Azurite 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?
- Name origin and history of AzuriteWhere the name comes from; how people have used it
- Listing and disclosing AzuriteThe listing name to use
- Standard clauses that define AzuriteWhich 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
Azurite is a basic copper carbonate and a secondary mineral of the oxidized (supergene) zone of copper deposits, occurring in oxidized zones associated with carbonate rocks and sometimes serving as an ore of copper. It precipitates from copper-bearing supergene fluids in fractures or underground spaces, followed by surface weathering and oxidation of the ore body. It commonly occurs with malachite and chrysocolla, and the two copper carbonates are rarely found apart because both form in exposed, oxidized parts of copper ore. Its deep blue is its most distinctive feature, and its name derives from the Persian word for blue.
Scope: Covers the origin and occurrence of azurite as a secondary copper carbonate mineral of the oxidation zone of copper deposits, together with its historical use as a blue pigment; does not address synthetic azurite.
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022 +1
Where it forms
The oxidized/supergene zone of copper deposits, in parts associated with carbonate rocks
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
Fractures and underground spaces in copper ore bodies, in low-temperature supergene fluids
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
Oxidized copper veins commonly intergrown with malachite, chrysocolla, cerussite and smithsonite
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
How it forms, step by step
A copper ore body forms, made up of primary minerals such as copper sulfides.
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
The ore body is exposed at the surface and undergoes weathering and oxidation, releasing copper into supergene fluids.
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
Copper-bearing fluids react in a carbonate environment within fractures or underground spaces, precipitating secondary copper carbonates such as azurite.
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
Azurite is intergrown with malachite and may partly weather to malachite, forming botryoidal, radial, or columnar aggregates.
Sources Handbook of Mineralogy · G&G Winter 2023 · G&G Fall 2022
Link to appearance
Azurite's deep blue color comes from its basic copper carbonate composition; crystals are typically complex, and aggregates may be botryoidal, radial, or columnar, with vitreous to subadamantine luster. Its deep blue made it an important blue pigment historically.
Sources Handbook of Mineralogy · CIBJO Gemstone Book 2022
Timescale
These sources do not state an absolute geological timescale for azurite formation.
Sources Handbook of Mineralogy · G&G Winter 2023
Supporting findings
Azurite is a secondary mineral of the oxidized (supergene) zone of copper deposits, occurring in oxidized zones associated with carbonate rocks and sometimes constituting an ore of copper.
Evidence grade AScope: Applies to the occurrence of natural secondary azurite; excludes synthetic material.
Sources Handbook of Mineralogy · G&G Winter 2023
Azurite occurs with malachite, chrysocolla, cerussite and smithsonite in the oxidized zone of copper deposits, and the two copper carbonates are rarely found apart.
Evidence grade AScope: Describes azurite's paragenesis and occurrence setting, without quantitative conditions.
Sources Handbook of Mineralogy · G&G Fall 2022
Recorded localities
Authoritative sources list the localities below; the list is not exhaustive.
Africa
- Tsumeb, Namibia
Sources Handbook of Mineralogy
- Touissit mine, near Oujda, Morocco
Sources Handbook of Mineralogy
Asia
- Shilu, Changjiang, Hainan, ChinaHoM gives the former province, Guangdong
Sources Handbook of Mineralogy
Europe
- Chessy, near Lyon, Rhône, France
Sources Handbook of Mineralogy
North America
- Bisbee and Morenci, Arizona, United Statesattractive azurite-malachite mixtures come mainly from old finds there
Sources G&G Winter 2017 · Handbook of Mineralogy
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.
Where the name comes from
Azurite is from the Persian lazhward, for its characteristic blue colour.
Evidence grade BScope: This states only the origin of the name and does not establish the material's composition, locality, natural origin, or whether it was treated.
Sources Handbook of Mineralogy
Human use and museum objects
For painters of the medieval and Renaissance eras, azurite served as the principal blue pigment, and it remained in use for centuries in Chinese and Japanese painting.
Evidence grade AScope: Concerns historical-cultural use, not geological formation.
Other research findings
Azurite is a basic copper carbonate, Cu3(CO3)2(OH)2; its name comes from the Persian word for its characteristic blue color.
Evidence grade BScope: Describes azurite's chemical composition and name origin.
Sources Handbook of Mineralogy
In the jewellery trade, azurite is also known by the name Chessylite; the standard name is Azurite, with Chessylite as a trade synonym.
Evidence grade AScope: Concerns naming and identity boundary, not origin or treatment.
Sources CIBJO Gemstone Book 2022
Limits of this research
- Research status: Formation, occurrence or other material-specific findings found in authoritative sources
- The Handbook of Mineralogy gives occurrence and paragenesis but does not quantify the P-T conditions or absolute age of azurite formation.
- The statement that azurite and malachite are rarely found apart is a qualitative source statement, not a universal claim about every locality.
- The CIBJO entry only provides a trade synonym (Chessylite); it does not concern origin.
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
- Azurite
GB/T 16552—2017 5.1.1 b) · CIBJO Gemmological Laboratories Book 2024 §7.2.1.25 “Azurite”
Construction or treatment status
Natural identity; treatment status unknown
Treatments recorded for this material: Waxed
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
Azurite is often subjected to waxing. Under GB/T 16552-2017, waxing (not listed separately in GB/T; Table 1 groups it with colourless oil or wax filling) counts as an optimization, so the plain gem name may be used (§5.4.2.1 a). Do not assume it is unenhanced.
What this means for you
Before buying, check the recommended listing name "Azurite" and any disclosed treatments on this page, and ask the seller for a grading report if in doubt.
Known uncertainty
- Disclosure rules for the treatments above can change as authorities update their standards; re-check before relying on this page.
- Last reviewed
- 2026-09-01
Care and wear
Normal care for every gemstone (CIBJO Gemstone Book §6.1), in brief:
- Handle it gently.
- Store pieces apart when not worn, so they cannot scratch each other.
- Clean with warm soapy water and a soft brush.
- Use ultrasonic cleaners only with caution.
The §6.1 wording and the full list of §6.2 special-care letters cited on this page are on the general gem care page.
Care
Azurite — care (cleaning): Some stones are susceptible to damage from ultrasonic cleaning. Do not expose them to ultrasonic cleaning.
CIBJO Gemstone Book 2022
CIBJO Gemstone Book §6.2:special-care code j
- Treatment state
- any treatment state
Source & check 2026-09-25
- Source
- CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022) (CIBJO): §8 Annex C, Azurite, p.34; §6.2 j (locator checked 2026-09-25)
- Fact checked on
- 2026-09-25
Azurite — care (chemicals): Some stones are particularly susceptible to attack by acids. Keep them away from acids.
CIBJO Gemstone Book 2022
CIBJO Gemstone Book §6.2:special-care code h
- Treatment state
- any treatment state
Source & check 2026-09-25
- Source
- CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022) (CIBJO): §8 Annex C, Azurite, p.34; §6.2 h (locator checked 2026-09-25)
- Fact checked on
- 2026-09-25
Azurite — care (chemicals): Treatments with dye, oil, resin, wax or plastic are not permanent; keep it away from all solvents (including dish-washing liquids), chemicals and heat.
CIBJO Gemstone Book 2022
CIBJO Gemstone Book §6.2:special-care code k
- Treatment state
- treated
Source & check 2026-09-25
- Source
- CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022) (CIBJO): §8 Annex C, Azurite, p.34; §6.2 k (locator checked 2026-09-25)
- Fact checked on
- 2026-09-25
Azurite — care (wear): Some stones are prone to scratching due to low hardness. Wear them with care.
CIBJO Gemstone Book 2022
CIBJO Gemstone Book §6.2:special-care code a
- Treatment state
- any treatment state
Source & check 2026-09-25
- Source
- CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022) (CIBJO): §8 Annex C, Azurite, p.34; §6.2 a (locator checked 2026-09-25)
- Fact checked on
- 2026-09-25
Azurite — care (wear): cleaves or fractures easily or is brittle (e.g. rubbed facet edges); wear with care.
CIBJO Gemstone Book 2022
CIBJO Gemstone Book §6.2:special-care code b
- Treatment state
- untreated
Source & check 2026-09-25
- Source
- CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022) (CIBJO): §8 Annex C, Azurite, p.34; §6.2 b (locator checked 2026-09-25)
- Fact checked on
- 2026-09-25
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
Care conclusions for Azurite are registered from the CIBJO Blue Book — Official Gemstone Book (Coloured Stone Commission 2022): Azurite in any treatment state must not be cleaned ultrasonically; Azurite in any treatment state is especially sensitive to acids and should be kept away from them; for treated Azurite, specifically stones treated with dye, oil, resin, wax or plastic, the treatment is not permanent and the stone should be kept away from all solvents, including dish-washing liquids, as well as chemicals and heat; Azurite in any treatment state is soft and scratches easily, so wear it with care; untreated Azurite fractures easily, so it too should be worn with care.
This table scrolls sideways on narrow screens.
| Question | Matching entries |
|---|---|
| Can it go in an ultrasonic or steam cleaner? | care (cleaning) |
| Contact with acids, alkalis and household chemicals | care (chemicals); Treatments with dye, oil, resin, wax or plastic are not permanent; keep it away from all solvents (including dish-washing liquids), chemicals and heat |
| Wearing limits (knocks, settings) | care (wear); cleaves or fractures easily or is brittle (e.g. rubbed facet edges); wear with care |
Care entries by treatment state
The same entries grouped by the treatment state each applies to; each links to its full wording and source. Letters are CIBJO special-care codes, explained on the gemstone care page.
any treatment state
- care (cleaning) §6.2 j
- care (chemicals) §6.2 h
- care (wear) §6.2 a
treated
untreated
Durability and wearing
Numbers in curly braces, such as {111}, are crystallographic face symbols (Miller indices): each marks a set of crystal faces or cleavage planes. They are reproduced as written in the cited source.
Cleavage
On {011} perfect but interrupted; on {100} fair; on {110} poor
Treatments and identification leads
Registered treatmentsThe treatments registered for Azurite are surface waxing and impregnation. Stability and frequencySurface waxing has treatment status treated, stability not stable and market prevalence common; impregnation has treatment status treated, stability not stable and market prevalence rare. Values not givenThe identification leads and sources for both surface waxing and impregnation are given as "—", meaning the cited source gives no value, not "none".
This table scrolls sideways on narrow screens.
| Treatment | Market frequency (CIBJO) | Stability (CIBJO) | GB/T 16552 category | JJA/AGL listing | Identification leads |
|---|---|---|---|---|---|
| surface waxingStatus: treated | commonly | unstable | — | — | — |
| impregnationStatus: treated | rarely | unstable | — | — | — |
Where each treatment acts (schematics): Waxed · Impregnated
“—” means the cited source gives no value for that item, not “none”. Source: CIBJO Gemstone Book 2022
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
Besides Azurite, the name register records "Chessylite", for which no restriction on use as a name is recorded (CIBJO Gemmological Laboratories Book 2024 §7.2.1.47 “Chessylite”).
Standard and listing namesUnder GB/T 16552—2017, Azurite can be named directly by its mineral or material name, because Annex A of the standard does not list it; the suggested listing name is Azurite. Names in four languagesThe four-language names are the Simplified and Traditional Chinese names, English Azurite and the Japanese names, with the GSJ (Japan) formal name written in kanji. Trade and mineralogical namesThe mineralogical name is Azurite, with the formula Cu3(CO3)2(OH)2. Institution usageChessylite is an old English name, and the CIBJO Gemmological Laboratories Book 2024 records Chessylite as a trade synonym of Azurite. For authority wording, CIBJO records Azurite; the FTC text on file has no wording for this name (checked); 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.
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| Name | Type | Matching | Use as a name | Basis |
|---|---|---|---|---|
| no restriction recorded (1) | ||||
| ChessyliteEnglish | historical name | matched automatically | no restriction recorded | CIBJO Gemmological Laboratories Book 2024 §7.2.1.47 “Chessylite” |
How each authority words this name: see Names › Authority wording.
- GSJ (Japan) formal name
- 藍銅鉱
- Mineral / material name (not in GB/T 16552 Annex A; usable directly)
- 蓝铜矿 (GB/T 16552—2017 §5.1.1 b))
- Mineralogical name
- Azurite (Cu3(CO3)2(OH)2)
- Trade names and synonyms
- Chessylite (historical name)
Four-language names
- 简体中文
- 蓝铜矿
- 繁體中文
- 藍銅礦
- English
- Azurite
- 日本語
- アズライト／藍銅鉱
See also: Misleading and prohibited trade names · Supplementary name index
Classification
- Origin
- Natural materials
- Material domain
- Natural inorganic gem materials
- Browsing family
- Carbonate minerals
- Identity tier
- Mineral species
- Mineral chemical class
- Carbonates
- Construction or treatment status
- Natural identity; treatment status unknown
What it is and how it's identified
The nomenclature status of Azurite is IMA status G, meaning grandfathered: described before the IMA existed and generally regarded as a valid mineral species; its composition (phase) is registered as azurite. Mohs hardness 3.5–4; cleavage perfect but discontinuous, tenacity brittle, with treatment status registered as untreated. Transparency is usually opaque to translucent, rarely transparent. Body colour is light to dark blue to violetish blue, with treatment status registered as untreated; the site note explains that in chapter 7 of the CIBJO Gemmological Laboratories Book, entries such as iolite, benitoite and colour-change sapphire also cover blue or bluish colours. Surface waxing and impregnation of Azurite are each registered as treated, with stability for both given as "not stable".
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
Azurite — nomenclature status: IMA status G: grandfathered (described before the IMA existed, and generally regarded as a valid species).
CIBJO Gemmological Laboratories Book 2024
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Azurite — composition (phase): azurite
CIBJO Gemmological Laboratories Book 2024
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Durability
Azurite — Mohs hardness: 3.5–4
Handbook of Mineralogy
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))
Source & check 2026-09-20
- Source
- Handbook of Mineralogy — Azurite (Mineral Data Publishing): p. 1, Physical Properties (locator checked 2026-09-20)
- Fact checked on
- 2026-09-20
Azurite — toughness: cleavage perfect but interrupted; tenacity brittle
Handbook of Mineralogy
- Treatment state
- untreated
Source & check 2026-09-20
- Source
- Handbook of Mineralogy — Azurite (Mineral Data Publishing): p. 1, Physical Properties (locator checked 2026-09-20)
- Fact checked on
- 2026-09-20
For Azurite, the stability of surface waxing is “unstable”.
CIBJO Gemstone Book 2022
- Treatment state
- treated
- Treatment
- surface waxing
Source & check 2026-09-25
- Source
- Fact checked on
- 2026-09-25
For Azurite, the stability of impregnation is “unstable”.
CIBJO Gemstone Book 2022
- Treatment state
- treated
- Treatment
- impregnation
Source & check 2026-09-25
- Source
- Fact checked on
- 2026-09-25
Optical
Azurite — transparency: usually opaque to translucent, rarely transparent.
CIBJO Gemmological Laboratories Book 2024
Source & check 2026-09-22
- Source
- Fact checked on
- 2026-09-22
Azurite — body colour: Light to dark blue to violetish blue.
CIBJO Gemmological Laboratories Book 2024
- Treatment state
- untreated
- Qualification
In chapter 7 of the CIBJO Gemmological Laboratories Book, the colour descriptions of Iolite, Benitoite, Colour-change Sapphire and other entries also name blue or a bluish colour.
- General note
- colour alone is not identity
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.
Testing and market
On identification and market for Azurite: there is no synthetic azurite on the market. Among azurite in circulation, surface waxing is common, with the status treated; impregnation is rare, with the status treated.
How far testing can go
Azurite — 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 Azurite in trade, the reported frequency of surface waxing is “commonly”.
CIBJO Gemstone Book 2022
- Treatment state
- treated
- Treatment
- surface waxing
Source & check 2026-09-25
- Source
- Fact checked on
- 2026-09-25
For Azurite in trade, the reported frequency of impregnation is “rarely”.
CIBJO Gemstone Book 2022
- Treatment state
- treated
- Treatment
- impregnation
Source & check 2026-09-25
- Source
- Fact checked on
- 2026-09-25
Each row's “Source & check” expands to the full source; the date beside it is the fact check date.
Clause-level definitions
Azurite is listed in CIBJO Gemmological Laboratories Book 2024 under the term Azurite, defined as light to dark blue to violetish blue, usually opaque to translucent and rarely transparent; the cross-check shows the Azurite entry is defined directly by CIBJO, and no identically named English entry was found in this edition of the GB/T annex. CIBJO Gemmological Laboratories Book 2024 also has the term Chessylite, defined as the trade use of chessylite as a synonym for azurite; its cross-check result is likewise defined directly by CIBJO, with no identically named English entry in this edition of the GB/T annex. Azurite also appears in the IMA Mineral List entry as Azurite Cu3(CO3)2(OH)2 G 1824; that entry is cross-checked against the RRUFF/IMA master mineral list (public domain data).
This table scrolls sideways on narrow screens.
| Term | Clause | Definition | Cross-check |
|---|---|---|---|
| Azurite | 7.2.1.25 | Light to dark blue to violetish blue; usually opaque to translucent, rarely transparent | Defined directly by CIBJO; no identically named English entry was found in this edition of the GB/T annex. |
| Chessylite | 7.2.1.47 | In the trade, chessylite is used as a synonym for azurite | Defined directly by CIBJO; no identically named English entry was found in this edition of the GB/T annex. |
| Azurite | IMA Mineral List entry | Azurite Cu3(CO3)2(OH)2 G 1824 | Cross-checked against the RRUFF/IMA master mineral list (public domain data). |
Evidence and sources
Authority basis and clause sources
Sources
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 Azurite on this site: 2 entries listed by this site's parent-entry links; synthetic, treated and similar entries carry their recorded state after the name; this page (Azurite) is marked.
- Azurite
Sub-entries (1)
This table scrolls sideways on narrow screens.
| Page | Content | Status |
|---|---|---|
| Browsing family | Carbonate minerals | Live |
| Treatments recorded for this material | Waxed | Live |
| Related articles | To be added (placeholder) | Planned |
Who maintains this page
The material facts in the Azurite 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.