Black Opal and Moonstone Physical Properties

Black Opal

Moonstone

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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

2.56-2.60

1.5 Fracture

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

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Not Available

2,1 basal ; 2,1 prismatic ; 3,1 pinacoidal

1.7 Mohs Hardness

6-6.5

1.8 Chemical Composition

SiO 2 + H 2OUlrich Henn and Claudio C.

Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

Black Opal and Moonstone Chemical Formula

While comparing Black Opal and Moonstone 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 Moonstone chemical formula.

Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
Chemical formula of Moonstone- Plagioclase Feldspar s: (Na,Ca)Al_1-2Si_3-2O₈ Orthoclase Feldspar : KAlSi₃O₈

Compare Blue Gemstones

Black Opal Vs Boulder Opal

Black Opal Vs Brucite

Black Opal Vs Caledonite

Black Opal and Moonstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Moonstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Moonstone Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 2.56-2.60 whereas that of Moonstone is 2.56-2.60.