Its typical occurrence is in lithium-rich pegmatites in association with albite, spodumene, petalite, amblygonite, lepidolite and quartz.
en.wikipedia.org Alkali feldspar dominates, commonly represented by orthoclase and the exsolved lamellar albite, form perthite.
en.wikipedia.org It occurs as a late hydrothermal phase in granitic pegmatites in association with albite, tourmaline, quartz and rarely gypsum.
en.wikipedia.org It is usually associated with lepidolite, beryl, quartz, albite, amblygonite, and spodumene of pegmatitic origin.
en.wikipedia.org The feldspar of the granulites is mostly orthoclase or cryptoperthite; microcline, oligoclase and albite are also common.
en.wikipedia.org