Gahnospinel and Sillimanite Physical Properties
Tenacity
Not Available
Tough
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.65-4.55
3.20-3.26
Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Splintery
Cleavage
None, but may exhibit slight parting
{010} perfect
Mohs Hardness
7.5-8
6-7.5
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Gahnospinel and Sillimanite Chemical Formula
While comparing Gahnospinel 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 Gahnospinel and Sillimanite chemical formula.
- Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Gahnospinel and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Gahnospinel and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Gahnospinel and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Gahnospinel is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.