Astrophyllite and Forsterite Physical Properties

Astrophyllite

Forsterite

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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

3.2-3.4

3.23-3.26

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

1.6 Cleavage

Perfect on [001] imperfect on [100]

Perfect on {010} imperfect on {100}

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

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

Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Astrophyllite and Forsterite Chemical Formula

While comparing Astrophyllite and Forsterite 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 Forsterite 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 Forsterite- Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Astrophyllite and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Forsterite Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 3.23-3.26 whereas that of Forsterite is 3.23-3.26.