Raw azuriteazurite

A mineral used as a blue pigment. An ore of copper related to malachite that, when ground up, makes a deep blue pigment with a greenish tinge. Azurite was an important pigment in ancient Egypt, often used for wall paintings. By the Renaissance, it was used for underpainting the far more costly ultramarine.Related resource: Pigments through the Ages on azurite. Also see color and paint.