Ultramarine is a deep blue pigment historically derived from lazurite, the principal component of the metamorphic rock lapis lazuli. The pigment was produced by grinding the stone and undergoing a complex washing process to isolate the blue mineral, which made it exceptionally valuable.
Ultramarine is a deep blue pigment historically derived from lazurite, the principal component of the metamorphic rock lapis lazuli. The pigment was produced by grinding the stone and undergoing a complex washing process to isolate the blue mineral, which made it exceptionally valuable.
Source: Wikipedia "Ultramarine" · CC BY-SA 4.0
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