Ettringite and Dolomite Physical Properties

Ettringite

Dolomite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

Poorly soluble in dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

1.772.80-2.95

1 7.18

1.5 Fracture

Not Available

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

1.6 Cleavage

Perfect on {10 1 0}

Perfect on {10 1 1}, rhombohedral cleavage

1.7 Mohs Hardness

2-2.53.5-4

2 10

1.8 Chemical Composition

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

CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Ettringite and Dolomite Chemical Formula

While comparing Ettringite and Dolomite 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 Dolomite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Dolomite- CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Ettringite and Dolomite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Dolomite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Dolomite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.80-2.95 whereas that of Dolomite is 2.80-2.95.