Black Opal and Carletonite Physical Properties

Black Opal

Carletonite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.97-2.222.45

1 7.18

1.5 Fracture

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

Conchoidal, Conchoidal, Brittle

1.6 Cleavage

Not Available

Perfect on {001}, good on {110}

1.7 Mohs Hardness

6-6.54-4.5

2 10

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Black Opal and Carletonite Chemical Formula

While comparing Black Opal and Carletonite 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 Carletonite chemical formula.

Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Carletonite- KNa 4Ca 4Si 8O 18(CO 3) 4(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Black Opal Vs Caledonite

Black Opal Vs Boulder Opal

Black Opal Vs Brucite

Black Opal and Carletonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Carletonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Carletonite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 2.45 whereas that of Carletonite is 2.45.