Rock Crystal and Apophyllite Physical Properties

Rock Crystal

Apophyllite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.30-2.50

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

Perfect on (001)

1.7 Mohs Hardness

74.5-5

2 10

1.8 Chemical Composition

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

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Rock Crystal and Apophyllite Chemical Formula

While comparing Rock Crystal and Apophyllite 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 Apophyllite chemical formula.

Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Compare Blue Gemstones

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Rock Crystal and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rock Crystal and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rock Crystal and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Rock Crystal is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.