What is "hawaiite"

n. 1 (context geology English) An olivine basalt intermediate between alkali olivine and mugearite. 2 (context mineral English) A gem variety of olivine peridot.

Hawaiite is an olivine basalt with a composition between alkali basalt and mugearite. It was first used as a name for some lavas found on the island of Hawaii.

In gemology, hawaiite is a colloquial term for Hawaii-originated peridot, which is a gem-quality olivine mineral.