Black Opal and Ferro-axinite Axinite-Fe Physical Properties

Black Opal

Ferro-axinite Axinite-Fe

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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

1.97-2.223.25-3.28

1 7.18

1.5 Fracture

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

Uneven

1.6 Cleavage

Not Available

{100} Distinct, {001} Poor, {110} Poor

1.7 Mohs Hardness

6-6.56.5-7

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

Ca2Fe++Al2BO3Si4O12(OH)

Black Opal and Ferro-axinite Axinite-Fe Chemical Formula

While comparing Black Opal and Ferro-axinite Axinite-Fe 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 Ferro-axinite Axinite-Fe chemical formula.

Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Ferro-axinite Axinite-Fe- Ca2Fe++Al2BO3Si4O12(OH)

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Black Opal Vs Brucite

Black Opal and Ferro-axinite Axinite-Fe Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Ferro-axinite Axinite-Fe Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Ferro-axinite Axinite-Fe Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 3.25-3.28 whereas that of Ferro-axinite Axinite-Fe is 3.25-3.28.