Astrophyllite and Emerald Physical Properties

Astrophyllite

Emerald

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

3.2-3.4

2.67-2.78

1.5 Fracture

Uneven, Brittle, Metallic

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

1.6 Cleavage

Perfect on [001] imperfect on [100]

Imperfect on the [0001]

1.7 Mohs Hardness

7.5-8

1.8 Chemical Composition

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

Be₃Al₂SiO₆

Astrophyllite and Emerald Chemical Formula

While comparing Astrophyllite and Emerald 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 Emerald 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 Emerald- Be₃Al₂SiO₆

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Astrophyllite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Astrophyllite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Astrophyllite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Astrophyllite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.