Sillimanite and Gedrite Physical Properties

Sillimanite

Gedrite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

Tough

3.20-3.26

Splintery

{010} perfect

6-7.5

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

3.15-3.259

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

5.5-6

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

Sillimanite and Gedrite Chemical Formula

While comparing Sillimanite and Gedrite 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 Gedrite chemical formula.

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Sillimanite and Gedrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Sillimanite and Gedrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite Vs Gedrite during the identification of gemstone. Specific gravity of Sillimanite is whereas that of Gedrite is .