Cat s Eye and Black Opal Physical Properties

Cat s Eye

Black Opal

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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

3.5-3.81.97-2.22

1 7.18

1.5 Fracture

Not Available

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

1,1 ; 3,2

Not Available

1.7 Mohs Hardness

8.56-6.5

2 10

1.8 Chemical Composition

BeAl ₂ O ₄

SiO 2 + H 2OUlrich Henn and Claudio C.

Cat s Eye and Black Opal Chemical Formula

While comparing Cat s Eye and Black Opal 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 Cat s Eye and Black Opal chemical formula.

Chemical formula of Cat s Eye- BeAl ₂ O ₄
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Cat s Eye and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cat s Eye and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cat s Eye and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Cat s Eye is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.