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mineral blue

noun

Definition of mineral blue 

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 sense 2

c : an iron blue usually lightened by admixture (as with white clay)

2a : azurite blue

b : antwerp blue

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