Thulite and Anhydrite Physical Properties

Thulite

Anhydrite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.12.90-2.98

1 7.18

1.5 Fracture

Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Conchoidal, Brittle, Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Perfect {010} imperfect {100}

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

1.7 Mohs Hardness

6-73.5

2 10

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Thulite and Anhydrite Chemical Formula

While comparing Thulite 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 Thulite and Anhydrite chemical formula.

Chemical formula of Thulite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Thulite and Anhydrite Specific Gravity

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