lazurite

Updated About encyclopedia.com content Print Article Share Article
views updated

lazurite Mineral Na8[(Si,A1)6O24](S,SO4) belonging to the sodalite group of minerals and with a similar composition to haüyne and nosean; sp. gr. 2.3–2.4; hardness 5.5; cubic; intense, deep, azure-blue, violet, light blue, or greenish-blue; vitreous lustre; usually compact, massive; cleavage imperfect, rhombododecahedral; occurs in the contact zone of alkaline, igneous rocks, in association with carbonate rocks, and in alkaline lavas. It is used to make ornaments.

More From Encyclopedia.com


You Might Also Like