Bertrandite and Anhydrite Physical Properties

Bertrandite

Anhydrite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.59-2.602.90-2.98

1 7.18

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Fracture

Conchoidal

Cleavage

{001} Perfect, {110} Distinct, {101} Distinct

Rare tabular and prismatic crystals. Usually occurs as fibrous, parallel veins that break off into cleavage fragments.

Mohs Hardness

6-73.5

2 10

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Chemical Composition

Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)

CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Bertrandite and Anhydrite Chemical Formula

While comparing Bertrandite and Anhydrite 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 Bertrandite and Anhydrite chemical formula.

Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Bertrandite and Anhydrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Bertrandite and Anhydrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bertrandite and Anhydrite Optical Properties during the identification of gemstone. Specific gravity of Bertrandite is 2.90-2.98 whereas that of Anhydrite is 2.90-2.98.