Charoite is only known from rocks that are either charoite-rich or charoite-dominated. The name used for these rocks is “charoitite”. [5] Most people in the gem and lapidary trades simply refer to them as “charoite” and may not suspect that they are a rock which contains a variety of rare minerals.

Charoitite is a contact metamorphic rock that usually contains a variety of alkaline calcium silicate accessory minerals. These can include miserite, benstonite, canasite, tinaksite, pectolite, and fedorite. These are often associated with textural varieties of charoite and include: massive (miserite), parallel fibers (benstonite), and radially fibrous (canasite and tinaksite).