Astrophyllite and Ruby Physical Properties

Astrophyllite

Ruby

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.43.97-4.05

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal

1.6 Cleavage

Perfect on [001] imperfect on [100]

No true cleavage

1.7 Mohs Hardness

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 ₂ O ₃

Astrophyllite and Ruby Chemical Formula

While comparing Astrophyllite and 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 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 Ruby- Al ₂ O ₃

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Astrophyllite and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Ruby Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.97-4.05 whereas that of Ruby is 3.97-4.05.