Anthophyllite and Black Opal Physical Properties

Anthophyllite

Black Opal

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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

2.9-3.5

1.97-2.22

1.5 Fracture

Conchoidal, Brittle, Conchoidal, Brittle, Conchoidal, Brittle

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

1.6 Cleavage

{110} Perfect, {???} Distinct, {???} Distinct

Not Available

1.7 Mohs Hardness

5.5-6

6-6.5

1.8 Chemical Composition

(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

SiO 2 + H 2OUlrich Henn and Claudio C.

Anthophyllite and Black Opal Chemical Formula

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

Chemical formula of Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

Compare Brown Gemstones

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Anthophyllite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Anthophyllite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Anthophyllite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Anthophyllite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.