Sillimanite and Bertrandite Physical Properties
Tenacity
Tough
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
2.59-2.60
Fracture
Splintery
Brittle, Metallic, Brittle, Metallic
Cleavage
{010} perfect
{001} Perfect, {110} Distinct, {101} Distinct
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Sillimanite and Bertrandite Chemical Formula
While comparing Sillimanite and Bertrandite 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 Bertrandite chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Bertrandite- Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Sillimanite and Bertrandite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Bertrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Bertrandite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.59-2.60 whereas that of Bertrandite is 2.59-2.60.