Astrophyllite and Diaspore Physical Properties

Astrophyllite

Diaspore

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1 Physical Properties

1.1 Tenacity

Not Available

Very brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.43.30-3.40

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, Brittle, Conchoidal

1.6 Cleavage

Perfect on [001] imperfect on [100]

{010} perfect, {110} distinct, {100} in traces

1.7 Mohs Hardness

36.5-7

2 10

1.8 Chemical Composition

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

AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Astrophyllite and Diaspore Chemical Formula

While comparing Astrophyllite and Diaspore 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 Diaspore 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 Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Astrophyllite and Diaspore Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.