Boracite and Spinel Physical Properties
Tenacity
Brittle
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.95-2.96
3.64-3.66
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
None
None, but may exhibit slight parting
Chemical Composition
Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
MgAl2O4
Boracite and Spinel Chemical Formula
While comparing Boracite 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 Boracite and Spinel chemical formula.
- Chemical formula of Boracite- Mg 3B 7O 13ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Spinel- MgAl2O4
Boracite and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Boracite and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Boracite and Spinel Optical Properties during the identification of gemstone. Specific gravity of Boracite is 3.64-3.66 whereas that of Spinel is 3.64-3.66.