SPINELS
- SPINEL, a mineral, also SPINELLE [n]
- A hard glassy mineral occurring as octahedral crystals of variable color and consisting chiefly of magnesium and aluminum oxides
- Any of a class of oxides including this, containing aluminum and another metal and having the general formula MAl2O4
- SPINEL, a mineral (a naturally occurring inorganic substance having a characteristic set of physical properties) [n]