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Black Opal
Black Opal

Thaumasite
Thaumasite



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Black Opal
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Thaumasite

Black Opal and Thaumasite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.97-2.22
1.91
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
1.6 Cleavage
Not Available
Indistinct
1.7 Mohs Hardness
6-6.5
3.5
1.8 Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Ca 6Si 2(CO 3) 2(SO 4) 2(OH) 12 · 24H 2OUlrich Henn and Claudio C.

Black Opal and Thaumasite Chemical Formula

While comparing Black Opal and Thaumasite 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 Thaumasite chemical formula.

  • Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
  • Chemical formula of Thaumasite- Ca 6Si 2(CO 3) 2(SO 4) 2(OH) 12 · 24H 2OUlrich Henn and Claudio C.

Black Opal and Thaumasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Thaumasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Thaumasite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 1.91 whereas that of Thaumasite is 1.91.