Scolecite and Ettringite Physical Properties

Scolecite

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

2.20-2.231.77

1 7.18

1.5 Fracture

Irregular/uneven, UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Uneven

Not Available

1.6 Cleavage

Perfect on {110} and {1 1 0}

Perfect on {10 1 0}

1.7 Mohs Hardness

5-5.52-2.5

2 10

1.8 Chemical Composition

CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.

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

Scolecite and Ettringite Chemical Formula

While comparing Scolecite 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 Scolecite and Ettringite chemical formula.

Chemical formula of Scolecite- CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Scolecite and Ettringite Specific Gravity

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