Phenakite and Topaz Physical Properties

Phenakite

Topaz

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.90-2.983.49-3.57

1 7.18

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Fracture

Conchoidal, ConchoidalWalter Schumann

Subconchoidal, Uneven, Conchoidal

Cleavage

Distinct on {11 2 0}, imperfect on {10 1 1}

[001] Perfect

Mohs Hardness

7.5-88

2 10

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Chemical Composition

Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Al₂SiO₄(F,OH)₂

Phenakite and Topaz Chemical Formula

While comparing Phenakite and Topaz 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 Phenakite and Topaz chemical formula.

Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Topaz- Al₂SiO₄(F,OH)₂

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Phenakite Vs Muscovite

Phenakite and Topaz Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phenakite and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Topaz Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 3.49-3.57 whereas that of Topaz is 3.49-3.57.