Astrophyllite and Star Ruby Physical Properties

Astrophyllite

Star Ruby

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.43.95-4.10

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect on [001] imperfect on [100]

Not Available

1.7 Mohs Hardness

3Not Available

2 10

1.8 Chemical Composition

(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)

Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

Astrophyllite and Star Ruby Chemical Formula

While comparing Astrophyllite and Star Ruby 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 Star Ruby 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 Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)

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Astrophyllite and Star Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Star Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Star Ruby Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.95-4.10 whereas that of Star Ruby is 3.95-4.10.