Crocoite and Sillimanite Physical Properties

Crocoite

Sillimanite

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1 Physical Properties

1.1 Tenacity

Not Available

Tough

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

5.90-6.103.20-3.26

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), (e.g. graphite).

Splintery

1.6 Cleavage

{110} Distinct, {001} Indistinct, {100} Indistinct

{010} perfect

1.7 Mohs Hardness

2.5-36-7.5

2 10

1.8 Chemical Composition

PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Crocoite and Sillimanite Chemical Formula

While comparing Crocoite 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 Crocoite and Sillimanite chemical formula.

Chemical formula of Crocoite- PbCrO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

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Crocoite and Sillimanite Specific Gravity

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