Black Opal and Axinite Physical Properties

Black Opal

Axinite

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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

1.97-2.22

3.26-3.36

1.5 Fracture

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

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

Good on {100}

1.7 Mohs Hardness

6-6.5

6.5-7

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

(Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Black Opal and Axinite Chemical Formula

While comparing Black Opal and Axinite 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 Black Opal and Axinite chemical formula.

Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Axinite- (Ca,Fe,Mn,Mg) 3Al 2BSi 4O 15(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Compare Blue Gemstones

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Black Opal and Axinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Axinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Axinite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.26-3.36 whereas that of Axinite is 3.26-3.36.