LAZULITE

Noun

lazulite (plural lazulites)

(mineral) A semi-precious gemstone that is a basic phosphate of magnesium, iron and aluminium

Synonyms

• azure spar

• blue spar

Source: Wiktionary

Laz"u*lite, n. Etym: [From lazuli : cf. F. lazulite, G. lazulith.] (Min.)

Definition: A mineral of a light indigo-blue color, occurring in small masses, or in monoclinic crystals; blue spar. It is a hydrous phosphate of alumina and magnesia.

Source: Webster’s Unabridged Dictionary 1913 Edition