Rock Crystal and Spinel Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
none
Durability
Not Available
Not Available
Specific Gravity
2.65
3.64-3.66
Fracture
ConchoidalWalter Schumann, Gemstones of the world (2001), ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
None, but may exhibit slight parting
Chemical Composition
SiO 2Walter Schumann , Gemstones of the world (2001)
MgAl2O4
Rock Crystal and Spinel Chemical Formula
While comparing Rock Crystal 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 Rock Crystal and Spinel chemical formula.
- Chemical formula of Rock Crystal- SiO 2Walter Schumann , Gemstones of the world (2001)
- Chemical formula of Spinel- MgAl2O4
Rock Crystal and Spinel Specific Gravity
Another important criteria for qualitative analysis of gemstones is Rock Crystal and Spinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rock Crystal and Spinel Optical Properties during the identification of gemstone. Specific gravity of Rock Crystal is 3.64-3.66 whereas that of Spinel is 3.64-3.66.