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