Thomsonite and Sillimanite Physical Properties
Tenacity
Not Available
Tough
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.25-2.40
3.20-3.26
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009)
Splintery
Cleavage
perfect on {010}; good on {100}
{010} perfect
Mohs Hardness
5-5.5
6-7.5
Chemical Composition
NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Thomsonite and Sillimanite Chemical Formula
While comparing Thomsonite 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 Thomsonite and Sillimanite chemical formula.
- Chemical formula of Thomsonite- NaCa 2Al 5Si 5O 20 · 6H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Thomsonite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Thomsonite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Thomsonite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Thomsonite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.