Astrophyllite and Chrysoprase Physical Properties

Astrophyllite

Chrysoprase

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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

2.58-2.64

1.5 Fracture

Uneven, Brittle, Metallic

Gems, Sixth Edition (2006)

1.6 Cleavage

Perfect on [001] imperfect on [100]

None

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)

SiO₂ (with a high level of nickel impurities )

Astrophyllite and Chrysoprase Chemical Formula

While comparing Astrophyllite and Chrysoprase 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 Chrysoprase 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 Chrysoprase- SiO₂ (with a high level of nickel impurities )

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Astrophyllite and Chrysoprase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Chrysoprase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Chrysoprase Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.58-2.64 whereas that of Chrysoprase is 2.58-2.64.