Hardystonite and Sillimanite Physical Properties

Hardystonite

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

3.396-3.4433.20-3.26

1 7.18

1.5 Fracture

Brittle, Metallic

Splintery

1.6 Cleavage

[001] good, [100] and [110] fair

{010} perfect

1.7 Mohs Hardness

3-46-7.5

2 10

1.8 Chemical Composition

Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)

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

Hardystonite and Sillimanite Chemical Formula

While comparing Hardystonite 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 Hardystonite and Sillimanite chemical formula.

Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare White Gemstones

Hardystonite Vs Leucite

Hardystonite Vs Jadeite

Hardystonite Vs Larimar

Hardystonite and Sillimanite Specific Gravity

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