Glittering Stones >> Semi Precious Stones >> Spinel

Semi Precious Stone Spinel

Spinel is one of the groups of minerals that crystallize in the isometric system with an octahedral habit, and whose chemical compositions are also analogous. These minerals are combinations of bivalent and trivalent oxides of magnesium, zinc, iron, manganese, aluminum and also chromium, the general formula being represented as R''O•R'''2O3. The bivalent oxides may be MgO, ZnO, FeO and MnO, and the trivalent oxides may be Al2O3, Fe2O3, Mn2O3 and Cr2O3.

Historical Facts of Spinel Refractive Index 1.712 - 1.762 Chemical Composition MgAl2O4 Hardness 8 Crystal habit Cubic, Octahedral Crystal system Isometric Density 3.54 - 3.63 Luster Vitreous Occurrence Sri Lanka, Burma, Thailand, Australia, Kenya, Brazil Types of spinel Gahnite, Franklinite, Ringwoodite, Magnetite, Ulvöspinel, Hercynite, Jacobsite, Trevorite, Chromite Color Orange, Pink, Black, Blue, Lavender, Mauve, Greenish blue, Vivid red

Gem Jewelry Spinel

Spinel Bracelet

Spinel Earrings

Spinel Necklace

Spinel Rings