Jet and Ettringite Physical Properties

Jet

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

1.19-1.351.77

1 7.18

1.5 Fracture

ConchoidalWalter Schumann, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

Not Available

1.6 Cleavage

Not Available

Perfect on {10 1 0}

1.7 Mohs Hardness

2.5-42-2.5

2 10

1.8 Chemical Composition

Not Available

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

Jet and Ettringite Chemical Formula

While comparing Jet and Ettringite 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 Jet and Ettringite chemical formula.

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

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Jet and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Jet and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Jet and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Jet is 1.77 whereas that of Ettringite is 1.77.