Lawsonite and Sillimanite Physical Properties

Lawsonite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.093.20-3.26

1 7.18

1.5 Fracture

White, Yellow, Pale blue, Brittle, Uneven

Splintery

1.6 Cleavage

Perfect on {100} and {010}, imperfect on {101}

{010} perfect

1.7 Mohs Hardness

86-7.5

2 10

1.8 Chemical Composition

Not Available

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

Lawsonite and Sillimanite Chemical Formula

While comparing Lawsonite 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 Lawsonite and Sillimanite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Lawsonite Vs Paraiba

Lawsonite Vs Sylvite

Lawsonite Vs Sulfur

Lawsonite and Sillimanite Specific Gravity

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