#spinel_ruby__ruby_spinel a spinel used as a gemstone (usually dark red)
supertype: #spinel a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
subtype: #almandine a purple variety of the ruby spinel
subtype: #balas_ruby__balasruby__balas__bala a pale rose-colored variety of the ruby spinel
subtype: #rubicelle a yellow or orange variety of ruby spinel
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