Rock Crystal and Gypsum Physical Properties

Rock Crystal

Gypsum

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.20-2.40

1 7.18

1.5 Fracture

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

Conchoidal, Splintery, Fibrous, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

Perfect on {010}, distinct on {100}

1.7 Mohs Hardness

2 10

1.8 Chemical Composition

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

CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Rock Crystal and Gypsum Chemical Formula

While comparing Rock Crystal and Gypsum 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 Rock Crystal and Gypsum chemical formula.

Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
Chemical formula of Gypsum- CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)

Compare Blue Gemstones

Rock Crystal Vs Serendibite

Rock Crystal Vs Scorzalite

Rock Crystal Vs Sardonyx

Rock Crystal and Gypsum Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rock Crystal and Gypsum Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rock Crystal and Gypsum Optical Properties during the identification of gemstone. Specific gravity of Rock Crystal is 2.20-2.40 whereas that of Gypsum is 2.20-2.40.