Prehnite and Astrophyllite Physical Properties

Prehnite

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

2.80-2.953.2-3.4

1 7.18

1.5 Fracture

Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic

Uneven, Brittle, Metallic

1.6 Cleavage

Distinct on [001]

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

6-6.53

2 10

1.8 Chemical Composition

Ca₂Al₂Si₃O₁₂(OH)

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

Prehnite and Astrophyllite Chemical Formula

While comparing Prehnite 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 Prehnite and Astrophyllite chemical formula.

Chemical formula of Prehnite- Ca₂Al₂Si₃O₁₂(OH)
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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Prehnite and Astrophyllite Specific Gravity

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