Ettringite and Tanzanite Physical Properties

Ettringite

Tanzanite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

Hard

1.4 Specific Gravity

1.773.35

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Perfect on {10 1 0}

Perfect {010}, imperfect {100}

1.7 Mohs Hardness

2-2.56.5-7

2 10

1.8 Chemical Composition

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Ca₂Al₃(SiO₄)₃(OH)

Ettringite and Tanzanite Chemical Formula

While comparing Ettringite 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 Ettringite and Tanzanite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Tanzanite- Ca₂Al₃(SiO₄)₃(OH)

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Ettringite and Tanzanite Specific Gravity

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