Tanzanite and Opal Physical Properties

Tanzanite

Opal

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1 Physical Properties

1.1 Tenacity

Not Available

BrittleWalter Schumann

1.2 Solubility

Not Available

hot salt water

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

3.35

1.98-2.25

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle

1.6 Cleavage

Perfect {010}, imperfect {100}

None

1.7 Mohs Hardness

6.5-7

5-6.5

1.8 Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

SiO₂ · nH₂O

Tanzanite and Opal Chemical Formula

While comparing Tanzanite and 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 Tanzanite and Opal chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Opal- SiO₂ · nH₂O

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Tanzanite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Opal Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 1.98-2.25 whereas that of Opal is 1.98-2.25.