The red spinel is at its most valued and most sought-after as the quintessence of a red gemstone. It is extremely area, hard and beautiful. A natural stone which brightens the mood and bestows constancy on its wearer.
Formula: MgAl2O4
Hardness: 8
Density: 3.54 – 3.90 g/cm3
Refractive Index: 1.739 – 1.770 DR: 0.007 – 0.011
Color:
Yellow, yellowish-green, green-brown, brown, chatoyant
Countries of Origin: Brazil, Sri Lanka, Tanzania