mineral blue

noun

Definition of mineral blue

  1. 1 :  a blue pigment: such as a :  a natural pigment made by grinding the mineral azurite or a synthetic pigment of similar composition —called also mountain blue — compare blue verditer b :  bremen blue 2 c :  an iron blue usually lightened by admixture (as with white clay)

  2. 2a :  azurite blue b :  antwerp blue 2

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