Calcite and Astrophyllite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.67-2.73
3.2-3.4
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Brittle, Metallic
Cleavage
Perfect on [10 1 1] three directions with angle of 74° 55
Perfect on [001] imperfect on [100]
Chemical Composition
CaCO 3Ulrich Henn and Claudio C.
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Calcite and Astrophyllite Chemical Formula
While comparing Calcite 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 Calcite and Astrophyllite chemical formula.
- Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Calcite and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Calcite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Calcite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.