Astrophyllite and Grossular Garnet Physical Properties

Astrophyllite

Grossular Garnet

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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

3.2-3.43.6

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Not Available

1.6 Cleavage

Perfect on [001] imperfect on [100]

None

1.7 Mohs Hardness

36.5-7.5

2 10

1.8 Chemical Composition

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

Ca₃Al₂Si₃O₁₂

Astrophyllite and Grossular Garnet Chemical Formula

While comparing Astrophyllite and Grossular Garnet 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 Grossular Garnet 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 Grossular Garnet- Ca₃Al₂Si₃O₁₂

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Astrophyllite and Grossular Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Grossular Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Grossular Garnet Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.6 whereas that of Grossular Garnet is 3.6.