Dioptase and Sillimanite Physical Properties

Dioptase

Sillimanite

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1 Physical Properties

1.1 Tenacity

Brittle

Tough

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-3.353.20-3.26

1 7.18

1.5 Fracture

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

Splintery

1.6 Cleavage

Perfect in three directions

{010} perfect

1.7 Mohs Hardness

56-7.5

2 10

1.8 Chemical Composition

CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Dioptase and Sillimanite Chemical Formula

While comparing Dioptase 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 Dioptase and Sillimanite chemical formula.

Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Green Gemstones

Dioptase Vs Euclase

Dioptase Vs Feldspar

Dioptase Vs Faustite

Dioptase and Sillimanite Specific Gravity

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