Willemite and Astrophyllite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.89-4.18
3.2-3.4
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven
Uneven, Brittle, Metallic
Cleavage
{0001}, {11 2 0} imperfect
Perfect on [001] imperfect on [100]
Chemical Composition
Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Willemite and Astrophyllite Chemical Formula
While comparing Willemite 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 Willemite and Astrophyllite chemical formula.
- Chemical formula of Willemite- Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Astrophyllite- (K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Willemite and Astrophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Willemite and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Willemite and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Willemite is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.