A dull blueish green colour.
An example (a stone) of the mineral beryl.
A mineral of pegmatite deposits, often used as a gemstone.
Of a dull bluish green colour.
A brilliant dark blue or slightly purplish colour like that of the pigment.
In full ultramarine blue: a brilliant blue pigment that was traditionally made from ground-up lapis lazuli, and now usually either extracted from mineral deposits or made synthetically.
Of a brilliant dark blue or slightly purplish colour like that of the pigment (noun sense 1).