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