Astrophyllite and Charoite Physical Properties
Specific Gravity
3.2-3.4
2.54-2.78
Fracture
Uneven
Conchoidal
Cleavage
Perfect on [001] imperfect on [100]
Good in three directions
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Astrophyllite and Charoite Chemical Formula
While comparing Astrophyllite and Charoite 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 Charoite 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 Charoite- K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Astrophyllite and Charoite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Charoite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Charoite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.54-2.78 whereas that of Charoite is 2.54-2.78.