Type may refer to:
Type (metaphysics), a concept in the type–token distinction
Type & Antitype in Typology (theology)
Type (model theory)
Type theory, basis for the study of type systems
Type or arity, the number of operands a function takes
Although there are dozens of different types of gems, among the best known and most important are diamond, ruby and sapphire, emerald and other gem forms of the mineral beryl, chrysoberyl, tanzanite, tsavorite, topaz and jade.