Astrophyllite and Hiddenite Physical Properties

Astrophyllite

Hiddenite

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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

3.2-3.43.15-3.21

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Gemstones of the world (2001), UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Perfect on [001] imperfect on [100]

1,2 prismatic

1.7 Mohs Hardness

36-7

2 10

1.8 Chemical Composition

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

LiAlSi₂O₆

Astrophyllite and Hiddenite Chemical Formula

While comparing Astrophyllite and Hiddenite 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 Hiddenite 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 Hiddenite- LiAlSi₂O₆

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Astrophyllite and Hiddenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Hiddenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Hiddenite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.15-3.21 whereas that of Hiddenite is 3.15-3.21.