turquoise
Sign in to saveTurquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula . It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.
AI overview
Turquoise is a blue-to-green mineral that forms from copper and aluminium, prized for thousands of years as a gemstone because of its attractive color. It is rare and particularly valuable in its finest forms, making it a sought-after stone for jewelry and decorative use.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.name
- Turquoise
- Mineral.category
- Phosphate minerals
- Mineral.boxbgcolor
- 00CED1
- Mineral.image
- Turquoise-40031.jpg
- Mineral.IMAsymbol
- Tqu
- Mineral.strunz
- 8.DD.15
- Mineral.system
- Triclinic
- Mineral.class
- Pinacoidal () (same H–M symbol)
- Mineral.colour
- Turquoise, blue, blue-green, green
- Mineral.habit
- Massive, nodular
- Mineral.cleavage
- Perfect on {001}, good on {010}, but cleavage rarely seen
- Mineral.fracture
- Conchoidal
Article
24 sectionsContents
- Names
- History
- Properties
- Formation
- Occurrence
- Iran
- Sinai
- United States
- Other sources
- History of use
- Cultural associations
- Imitations
- Treatments
- Waxing and oiling
- Backing
- Zachery treatment
- Dyeing
- Stabilization
- Reconstitution
- Valuation and care
- See also
- References
- Further reading
- External links
{{Infobox mineral | name = Turquoise | category = Phosphate minerals | boxwidth = | boxbgcolor =#00CED1 | image = Turquoise-40031.jpg | caption = | formula = | IMAsymbol = Tqu | strunz = 8.DD.15 | system = Triclinic | class = Pinacoidal () (same H–M symbol) | colour = Turquoise, blue, blue-green, green | habit = Massive, nodular | twinning = | cleavage = Perfect on {001}, good on {010}, but cleavage rarely seen | fracture = Conchoidal | mohs = 5–6 | luster = Waxy to subvitreous | refractive = nα = 1.610nβ = 1.615nγ = 1.650 | opticalprop = Biaxial (+) | birefringence = +0.040 | pleochroism = Weak | streak = Bluish white | gravity = 2.6–2.9 | melt = | fusibility = Fusible in heated HCl | diagnostic = | solubility = Soluble in HCl | diaphaneity = Opaque | references = }}
Turquoise is an opaque, blue-to-green mineral that is a hydrous phosphate of copper and aluminium, with the chemical formula . It is rare and valuable in finer grades and has been prized as a gemstone for millennia due to its hue.