Tanzanite and Williamsite Physical Properties

Tanzanite

Williamsite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Hard

3.35

Uneven, Conchoidal

Perfect {010}, imperfect {100}

6.5-7

Ca₂Al₃(SiO₄)₃(OH)

2.51-2.63

Conchoidal

Perfect

(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Tanzanite and Williamsite Chemical Formula

While comparing Tanzanite and Williamsite 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 Tanzanite and Williamsite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)

Compare Semi Precious Gemstones

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Tanzanite and Williamsite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Williamsite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Williamsite Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 2.51-2.63 whereas that of Williamsite is 2.51-2.63.