Datolite and Tanzanite Physical Properties

Datolite

Tanzanite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Hard

Specific Gravity

2.90-3.003.35

1 7.18

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Fracture

Conchoidal, Uneven

Uneven, Conchoidal

Cleavage

None

Perfect {010}, imperfect {100}

Mohs Hardness

5-5.56.5-7

2 10

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Chemical Composition

CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Ca₂Al₃(SiO₄)₃(OH)

Datolite and Tanzanite Chemical Formula

While comparing Datolite 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 Datolite and Tanzanite chemical formula.

Chemical formula of Datolite- CaBSiO 4(OH)Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Datolite Vs Feldspar

Datolite and Tanzanite Specific Gravity

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