Spinel and Anhydrite Physical Properties

Spinel

Anhydrite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

none

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.64-3.662.90-2.98

1 7.18

1.5 Fracture

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)

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

1.6 Cleavage

None, but may exhibit slight parting

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

1.7 Mohs Hardness

83.5

2 10

1.8 Chemical Composition

MgAl₂O₄

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

Spinel and Anhydrite Chemical Formula

While comparing Spinel 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 Spinel and Anhydrite chemical formula.

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

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Spinel and Anhydrite Specific Gravity

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