Topaz and Omphacite Physical Properties

Topaz

Omphacite

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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

3.49-3.573.16-3.43

1 7.18

1.5 Fracture

Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

1.6 Cleavage

[001] Perfect

{110} Good, {110} Good

1.7 Mohs Hardness

85-6

2 10

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

(Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Topaz and Omphacite Chemical Formula

While comparing Topaz and Omphacite 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 Topaz and Omphacite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Omphacite- (Ca,Na)(Mg,Fe,Al)Si 2O 6Anthony et al , Handbook of Mineralogy (2001)

Compare Gems for Sagittarius

Topaz Vs Quartz Smoky

Topaz Vs Pietersite

Topaz Vs Petoskey Stone

Topaz and Omphacite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Topaz and Omphacite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Omphacite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.16-3.43 whereas that of Omphacite is 3.16-3.43.