spinel

/spəˈnɛl/

Other forms: spinels

Definitions of spinel

1. noun

   a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
   types:

   ruby spinel, spinel ruby

   a spinel used as a gemstone (usually dark red)

   Ceylonite, pleonaste

   a dark-colored spinel containing iron

   almandine

   a purple variety of the ruby spinel

   balas, balas ruby

   a pale rose-colored variety of the ruby spinel

   rubicelle

   a yellow or orange variety of ruby spinel

   type of:

   mineral

   solid homogeneous inorganic substances occurring in nature having a definite chemical composition