Astrophyllite and Smoky Quartz Physical Properties

Astrophyllite

Smoky Quartz

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.2-3.42.65

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Perfect on [001] imperfect on [100]

{0110} Indistinct

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)

SiO₂

Astrophyllite and Smoky Quartz Chemical Formula

While comparing Astrophyllite and Smoky Quartz 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 Smoky Quartz 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 Smoky Quartz- SiO₂

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Astrophyllite and Smoky Quartz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Smoky Quartz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Smoky Quartz Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.65 whereas that of Smoky Quartz is 2.65.