Linked from
The 26 pages that link to Feldspar, each with the reason it gives.
GraniteRelated: Feldspar commonly makes up most of granite’s light-colored grains.
PorcelainRelated: It acts as a flux, helping porcelain vitrify during firing.
Ceramic glazeRelated: Feldspars supply several ingredients that help a glaze form glass in a kiln.
PegmatiteRelated: Feldspar commonly forms conspicuously large crystals in pegmatite.
GneissRelated: Feldspars commonly occur with quartz in gneiss’s light layers.
KaoliniteRelated: Feldspar is a common parent mineral from which kaolinite forms.
GranuliteRelated: Feldspars commonly form much of granulite’s light-colored mineral framework.