Edenite and Sillimanite Physical Properties

Edenite

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

3.05-3.373.20-3.26

1 7.18

1.5 Fracture

Conchoidal, Brittle, Conchoidal

Splintery

1.6 Cleavage

Good on (110)

{010} perfect

1.7 Mohs Hardness

5-66-7.5

2 10

1.8 Chemical Composition

NaCa2Mg5Si7AlO22(OH)2

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

Edenite and Sillimanite Chemical Formula

While comparing Edenite 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 Edenite and Sillimanite chemical formula.

Chemical formula of Edenite- NaCa2Mg5Si7AlO22(OH)2
Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Gems Found In Africa

Edenite Vs Aegirine

Edenite Vs Alexandrite

Edenite Vs Agate Opal

Edenite and Sillimanite Specific Gravity

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