Anhydrite and Spinel Physical Properties

Anhydrite

Spinel

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

none

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.983.64-3.66

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

3.58

2 10

1.8 Chemical Composition

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

MgAl₂O₄

Anhydrite and Spinel Chemical Formula

While comparing Anhydrite and Spinel 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 Anhydrite and Spinel chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Spinel- MgAl₂O₄

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Anhydrite and Spinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.