Turquoise and Astrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.30-2.90
3.2-3.4
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Uneven, Brittle, Metallic
Cleavage
Good to perfect_usually N/A
Perfect on [001] imperfect on [100]
Chemical Composition
CuAl6(PO4)4(OH)8 • 4H2O
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Turquoise and Astrophyllite Chemical Formula
While comparing Turquoise and Astrophyllite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Turquoise and Astrophyllite chemical formula.
- Chemical formula of Turquoise- CuAl6(PO4)4(OH)8 • 4H2O
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Turquoise and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Turquoise and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Turquoise and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Turquoise is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.