Astrophyllite and Dallasite Physical Properties

Astrophyllite

Dallasite

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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

3.2-3.42.58-2.91

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Not Available

1.6 Cleavage

Perfect on [001] imperfect on [100]

Not Available

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)

Not Available

Astrophyllite and Dallasite Chemical Formula

While comparing Astrophyllite and Dallasite 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 Dallasite chemical formula.

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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Astrophyllite and Dallasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Dallasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Dallasite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.58-2.91 whereas that of Dallasite is 2.58-2.91.