Sillimanite and Caledonite Physical Properties

Sillimanite

Caledonite

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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

3.20-3.265.6-5.76

1 7.18

1.5 Fracture

Splintery

Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)

1.6 Cleavage

{010} perfect

[001] perfect; [100] distinct

1.7 Mohs Hardness

6-7.52.5-3

2 10

1.8 Chemical Composition

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

Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

Sillimanite and Caledonite Chemical Formula

While comparing Sillimanite and Caledonite 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 Caledonite chemical formula.

Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Caledonite- Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

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Sillimanite Vs Strontium Titanate

Sillimanite Vs Starlite

Sillimanite and Caledonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Caledonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Caledonite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 5.6-5.76 whereas that of Caledonite is 5.6-5.76.