Angelite and Ettringite Physical Properties

Angelite

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

Not Available1.77

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

Not Available

Perfect on {10 1 0}

1.7 Mohs Hardness

3.52-2.5

2 10

1.8 Chemical Composition

Not Available

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

Angelite and Ettringite Chemical Formula

While comparing Angelite 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 Angelite 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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Angelite and Ettringite Specific Gravity

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