Phenakite and Sylvite Physical Properties

Phenakite

Sylvite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.981.993

1 7.18

1.5 Fracture

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

Uneven, Brittle

1.6 Cleavage

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

Perfect on [100], [010], [001]

1.7 Mohs Hardness

7.5-82.5

2 10

1.8 Chemical Composition

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

Not Available

Phenakite and Sylvite Chemical Formula

While comparing Phenakite and Sylvite 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 Sylvite chemical formula.

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

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Phenakite and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phenakite and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 1.993 whereas that of Sylvite is 1.993.