Astrophyllite and Labradorite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.2-3.4
2.69-2.72
Fracture
Uneven, Brittle, Metallic
Uneven, Conchoidal, Gems, Sixth Edition (2006)
Cleavage
Perfect on [001] imperfect on [100]
Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}
Chemical Composition
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
(Na,Ca)1-2Si3-2O8
Astrophyllite and Labradorite Chemical Formula
While comparing Astrophyllite and Labradorite 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 Labradorite 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 Labradorite- (Na,Ca)1-2Si3-2O8
Astrophyllite and Labradorite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Astrophyllite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.