Rosasite and Ettringite Physical Properties

Rosasite

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Effervesces in cold

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

4-4.21.77

1 7.18

1.5 Fracture

Splintery

Not Available

1.6 Cleavage

Perfect on {100} and {010}

Perfect on {10 1 0}

1.7 Mohs Hardness

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)

Rosasite and Ettringite Chemical Formula

While comparing Rosasite 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 Rosasite 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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Rosasite and Ettringite Specific Gravity

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