Turquoise Inlay

Chemical Composition	CuAl6(PO4)4(OH)8·4H2O
Crystal System	Triclinic
Hardness (Mohs Scale)	5 - 6
Density	2.6 - 2.9 g/cm³
Color	Blue to green, often with brown or black matrix
Transparency	Translucent to opaque
Luster	Sub-Vitreous to Waxy
Refractive Index	1.62 - 1.65
Cleavage	None (brittle)
Fracture	Conchoidal
Specific Gravity	2.7 - 6.0
Streak	White
Inlay Durability	Moderate (prone to scratching and wear over time)

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