azurite

This term refers specifically to a mineral species. In an artistic context, it is frequently discussed alongside lapis lazuli, though azurite is a copper-based mineral whereas lapis is a complex rock. It is often associated with historical pigments used in Renaissance art before the widespread availability of synthetic blues.

As a mineral name, it is typically treated as an uncountable mass noun when referring to the substance or pigment. While it can be used countably when referring to specific mineral specimens or crystals in a geological collection, the primary usage in art and chemistry is uncountable.