Phenakite and Riebeckite Physical Properties

Phenakite

Riebeckite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.983.28-3.44

1 7.18

1.5 Fracture

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

Uneven, Splintery, Brittle

1.6 Cleavage

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

Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}

1.7 Mohs Hardness

7.5-85.0-6.0

2 10

1.8 Chemical Composition

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

Not Available

Phenakite and Riebeckite Chemical Formula

While comparing Phenakite and Riebeckite 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 Riebeckite chemical formula.

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

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Phenakite and Riebeckite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phenakite and Riebeckite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Riebeckite Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 3.28-3.44 whereas that of Riebeckite is 3.28-3.44.