AZURITE….the stone of “Letting Go” copper carbonate hydroxide. produced by the weathering of copper ore deposits. Azurite color combinations include electric blue, blue green, and turquoise. In ancient times Azurite was used to produce a blue pigments and depending on the levels of copper carbonate produced a shades of blues. Chemical analysis of paintings from the Middle Ages shows azurite being recognized as a major source of the blues used by medieval painters.