Ruby and Astrophyllite Physical Properties

Ruby

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.97-4.053.2-3.4

1 7.18

1.5 Fracture

Conchoidal

Uneven, Brittle, Metallic

1.6 Cleavage

No true cleavage

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

Al ₂ O ₃

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

Ruby and Astrophyllite Chemical Formula

While comparing Ruby 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 Ruby and Astrophyllite chemical formula.

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

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Ruby and Astrophyllite Specific Gravity

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