Fluorite and Astrophyllite Physical Properties

Fluorite

Astrophyllite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

slightly water soluble and in hot hydrochloric acid

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.00-3.253.2-3.4

1 7.18

1.5 Fracture

Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Uneven, Brittle, Metallic

1.6 Cleavage

Octahedral, perfect on {111}, parting on {011}

Perfect on [001] imperfect on [100]

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

CaF₂

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

Fluorite and Astrophyllite Chemical Formula

While comparing Fluorite 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 Fluorite and Astrophyllite chemical formula.

Chemical formula of Fluorite- CaF₂
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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Fluorite and Astrophyllite Specific Gravity

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