Photos of rocks with minerals that occur only in igneous rocks. Click on any photo for a larger image. Some of the larger images may be on other web sites and will open in a new window.

Leucite Phenocrysts

igmins-hs_001.White, tetragonal, cm-size leucite phenocrysts in a basalt.

Sanidine Phenocrysts

igmins-hs_002. Sandine phenocrysts in trachyte, Drachenfels, Siebengebirge, Königswinter, Germany, Krantz Collection.