Tourmaline and Spinel Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
none
Durability
Not Available
Not Available
Specific Gravity
2.85-3.35
3.64-3.66
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Indistinct
None, but may exhibit slight parting
Chemical Composition
Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
MgAl2O4
Tourmaline and Spinel Chemical Formula
While comparing Tourmaline and Spinel 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 Tourmaline and Spinel chemical formula.
- Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
- Chemical formula of Spinel- MgAl2O4
Tourmaline and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Tourmaline and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Tourmaline and Spinel Optical Properties during the identification of gemstone. Specific gravity of Tourmaline is 3.64-3.66 whereas that of Spinel is 3.64-3.66.