Sard and Astrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.58-2.63
3.2-3.4
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Brittle, Metallic
Cleavage
Not Available
Perfect on [001] imperfect on [100]
Chemical Composition
SiO 2Ulrich Henn and Claudio C.
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Sard and Astrophyllite Chemical Formula
While comparing Sard 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 Sard and Astrophyllite chemical formula.
- Chemical formula of Sard- SiO 2Ulrich 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)
Sard and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sard and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sard and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Sard is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.