Sillimanite and Pectolite Physical Properties

Sillimanite

Pectolite

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1 Physical Properties

1.1 Tenacity

Tough

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.20-3.262.74-2.90

1 7.18

1.5 Fracture

Splintery

Uneven, Gemstones (2009), Splintery

1.6 Cleavage

{010} perfect

Perfect on {100} and {001}

1.7 Mohs Hardness

6-7.54.5-5

2 10

1.8 Chemical Composition

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

Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Sillimanite and Pectolite Chemical Formula

While comparing Sillimanite and Pectolite 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 Sillimanite and Pectolite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Compare Blue Gemstones

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Sillimanite and Pectolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.