Turquoise
mineral · uncommon
Quick facts
- Formula
- CuAl6(PO4)4(OH)8·4H2O
- Hardness
- 5–6
- Luster
- Waxy
- Colors
- Blue-green
Hydrated copper aluminum phosphate. Often veined with host rock. Widely imitated in plastic and dyed howlite.
Howlite is softer and usually white with gray veins before dyeing.
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