Thomsonite and Anhydrite Physical Properties

Thomsonite

Anhydrite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.25-2.402.90-2.98

1 7.18

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Fracture

Conchoidal

Cleavage

perfect on {010}; good on {100}

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

Mohs Hardness

5-5.53.5

2 10

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Chemical Composition

NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Thomsonite and Anhydrite Chemical Formula

While comparing Thomsonite 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 Thomsonite and Anhydrite chemical formula.

Chemical formula of Thomsonite- NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Thomsonite and Anhydrite Specific Gravity

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