schönfelsite
noun
schön·fels·ite
ˈshōnˌfelˌzīt,
ˈshə(r)n-
plural -s
: a feldspar-free basalt with phenocrysts of olivine and augite in a dense groundmass of titanomagnetite, orthorhombic pyroxene, apatite, interstitial brown glass, and traces of basic plagioclase
Word History
Etymology
German schönfelsit, from Altschönfels, Saxony, Germany + German -it -ite