Anhydrite and Rock Crystal Physical Properties

Anhydrite

Rock Crystal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-2.98

2.65

1.5 Fracture

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

ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

3.5

1.8 Chemical Composition

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

SiO 2Walter Schumann , Gemstones of the world (2001)

Anhydrite and Rock Crystal Chemical Formula

While comparing Anhydrite and Rock Crystal 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 Rock Crystal chemical formula.

Chemical formula of Anhydrite- CaSO 4Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)

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Anhydrite and Rock Crystal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anhydrite and Rock Crystal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anhydrite and Rock Crystal Optical Properties during the identification of gemstone. Specific gravity of Anhydrite is 2.65 whereas that of Rock Crystal is 2.65.