Tanzanite and Chrome-Chalcedony Physical Properties

Tanzanite

Chrome-Chalcedony

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Physical Properties

Tenacity

Solubility

Durability

Hard

Specific Gravity

3.352.55-2.70

1 7.18

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Fracture

Uneven, Conchoidal

Cleavage

Perfect {010}, imperfect {100}

None

Mohs Hardness

6.5-76.5-7

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

Tanzanite and Chrome-Chalcedony Chemical Formula

While comparing Tanzanite and Chrome-Chalcedony 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 Chrome-Chalcedony chemical formula.

Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Chrome-Chalcedony- SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)

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Tanzanite and Chrome-Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Tanzanite and Chrome-Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tanzanite and Chrome-Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Tanzanite is 2.55-2.70 whereas that of Chrome-Chalcedony is 2.55-2.70.