Lazulite forms by high-grade metamorphism of silica-rich rocks and in pegmatites. It occurs in association with quartz, andalusite, rutile, kyanite, corundum, muscovite, pyrophyllite, dumortierite, wagnerite, svanbergite, trolleite, and berlinite in metamorphic terrains; and with albite, quartz, muscovite, tourmaline and beryl in pegmatites.7 It may be confused with lazurite, lapis lazuli or azurite.
The type locality is in Freßnitzgraben in Krieglach, it's also found in Salzburg, Austria; Zermatt, Switzerland; Minas Gerais, Brazil; Lincoln County, Georgia; Inyo County, California; the Yukon in Canada; and elsewhere.
It was first described in 1795 for deposits in Styria, Austria.8 Its name comes from the German lazurstein, for 'blue stone'9 or from the Arabic for heaven.1011
Krivovichev V. G. Mineralogical glossary. Scientific editor A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. (in Russian) https://uk.wikipedia.org/wiki/%D0%91%D1%83%D0%BB%D0%B0%D1%85_%D0%90%D0%BD%D0%B4%D1%80%D1%96%D0%B9_%D0%93%D0%BB%D1%96%D0%B1%D0%BE%D0%B2%D0%B8%D1%87 ↩
"Lazulite". Mindat.org. http://www.mindat.org/show.php?id=2356 ↩
Hurlbut, Cornelius S.; Klein, Cornelius (1985). Manual of Mineralogy (20th ed.). Wiley. ISBN 0-471-80580-7. 0-471-80580-7 ↩
"Lazulite". Minerals.net. https://minerals.net/mineral/lazulite.aspx ↩
"Lazulite" (PDF). Handbook of Mineralogy. RRUFF. Archived (PDF) from the original on Jul 5, 2021. http://rruff.geo.arizona.edu/doclib/hom/lazulite.pdf ↩