ruby spinel

Noun
  1. is a type of: spinel - a hard glassy mineral consisting of an oxide of magnesium and aluminum; occurs in various colors that are used as gemstones
    subtypes:
    • 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
    same as: spinel ruby

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