Spinel and Astrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
none
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.64-3.66
3.2-3.4
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Uneven, Brittle, Metallic
Cleavage
None, but may exhibit slight parting
Perfect on [001] imperfect on [100]
Chemical Composition
MgAl2O4
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Spinel and Astrophyllite Chemical Formula
While comparing Spinel 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 Spinel and Astrophyllite chemical formula.
- Chemical formula of Spinel- MgAl2O4
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Spinel and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Spinel and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.