Phenakite and Cinnabar Physical Properties

Phenakite

Cinnabar

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Physical Properties

Tenacity

Brittle

Slightly sectile

Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

2.90-2.982

1 7.18

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Fracture

Conchoidal, ConchoidalWalter Schumann

Uneven

Cleavage

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

Prismatic {10 1 0}, perfect

Mohs Hardness

7.5-82-2.5

2 10

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Chemical Composition

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

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Phenakite and Cinnabar Chemical Formula

While comparing Phenakite and Cinnabar 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 Cinnabar chemical formula.

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

Compare Colorless Gems

Phenakite Vs Orthoclase

Phenakite Vs Oligoclase

Phenakite Vs Muscovite

Phenakite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Phenakite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 2 whereas that of Cinnabar is 2.