Editing Lapis lazuli (section)

===Composition===
The most important mineral component of lapis lazuli is [[lazurite]]<ref>{{Cite web|url=https://www.mindat.org/min-2330.html|title=Lapis lazuli: Mineral information, data and localities.|website=www.mindat.org|access-date=2020-02-13|archive-date=2020-01-29|archive-url=https://web.archive.org/web/20200129083053/https://www.mindat.org/min-2330.html|url-status=live}}</ref> (25% to 40%),{{citation needed|date=August 2024}} a blue [[feldspathoid]] [[silicate mineral]] of the sodalite family, with the formula Na<sub>7</sub>Ca(Al<sub>6</sub>Si<sub>6</sub>O<sub>24</sub>)(SO<sub>4</sub>)(S<sub>3</sub>) ·H<sub>2</sub>O .<ref>{{Cite web|url=https://www.mindat.org/min-2357.html|title=Lazurite: Mineral information, data and localities.|website=www.mindat.org|access-date=2020-02-13|archive-date=2020-04-03|archive-url=https://web.archive.org/web/20200403042835/https://www.mindat.org/min-2357.html|url-status=live}}</ref> Most lapis lazuli also contains [[calcite]] (white), and [[pyrite]] (metallic yellow). Some samples of lapis lazuli contain [[augite]], [[diopside]], [[enstatite]], [[mica]], [[hauynite]], [[hornblende]], [[nosean]], and sulfur-rich [[löllingite]] ''geyerite''.

Lapis lazuli usually occurs in crystalline [[marble]] as a result of [[contact metamorphism]].