Scolecite and Sillimanite Physical Properties

Scolecite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.20-2.233.20-3.26

1 7.18

1.5 Fracture

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

Splintery

1.6 Cleavage

Perfect on {110} and {1 1 0}

{010} perfect

1.7 Mohs Hardness

5-5.56-7.5

2 10

1.8 Chemical Composition

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

Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Scolecite and Sillimanite Chemical Formula

While comparing Scolecite and Sillimanite 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 Sillimanite chemical formula.

Chemical formula of Scolecite- CaAl 2Si 3O 10 · 3H 2OUlrich Henn and Claudio C.
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Scolecite and Sillimanite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Scolecite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Scolecite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Scolecite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.