Sardonyx and Astrophyllite Physical Properties

Sardonyx and Astrophyllite Chemical Formula

While comparing Sardonyx 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 Sardonyx and Astrophyllite chemical formula.

• Chemical formula of Sardonyx- 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)

Sardonyx and Astrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sardonyx and Astrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sardonyx and Astrophyllite Optical Properties during the identification of gemstone. Specific gravity of Sardonyx is 3.2-3.4 whereas that of Astrophyllite is 3.2-3.4.