Ultramarine
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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 com
Synthetic ultramarine pigment
Lapis lazuli specimen (rough), Afghanistan
Natural ultramarine
International Klein Blue
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International Klein Blue is a deep blue hue first mixed by the French artist Yves Klein. IKB's visual impact comes from its heavy reliance on ultramarine, as well as Klein's often thick and textured a
Ultramarine
…Different grades of pigment may have been used for different areas in a painting, a characteristic that is sometimes used in art authentication. International Klein Blue (IKB) a deep blue hue first mixed by the French artist Yves Klein. Electric ultramarine is the tone of ultramarine that is halfway between blue and…
IKB 191 (1962), one of a number of works Klein painted with International Klein Blue