Kyanite and Tanzanite Physical Properties

Kyanite

Tanzanite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

3.53-3.65

3.35

1.5 Fracture

Splintery, Brittle, Metallic

Uneven, Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

[100] perfect [010] imperfect with 79° angle between

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

4-7

6.5-7

1.8 Chemical Composition

Not Available

Ca₂Al₃(SiO₄)₃(OH)

Kyanite and Tanzanite Chemical Formula

While comparing Kyanite and Tanzanite 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 Kyanite and Tanzanite chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Kyanite and Tanzanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Kyanite and Tanzanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Tanzanite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.35 whereas that of Tanzanite is 3.35.