Astrophyllite and Goldstone Physical Properties

Astrophyllite

Goldstone

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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

3.2-3.42.50-2.80

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

torn surfaces, (e.g. fractured metals).

1.6 Cleavage

Perfect on [001] imperfect on [100]

None

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)

Astrophyllite and Goldstone Chemical Formula

While comparing Astrophyllite and Goldstone 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 Goldstone 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 Goldstone- Au

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Astrophyllite and Goldstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Goldstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Goldstone Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.50-2.80 whereas that of Goldstone is 2.50-2.80.