Sillimanite and Tourmaline Physical Properties
Tenacity
Tough
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
2.85-3.35
Fracture
Splintery
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
{010} perfect
Indistinct
Mohs Hardness
6-7.5
7-7.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Sillimanite and Tourmaline Chemical Formula
While comparing Sillimanite and Tourmaline 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 Tourmaline chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
Sillimanite and Tourmaline Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.