rock, stone - material consisting of the aggregate of minerals like those making up the Earth's crust; "that mountain is solid rock"; "stone is abundant in New England and there are many quarries"

andesite - a dark gray volcanic rock

aplite - light-colored and fine-grained granitic rock consisting chiefly of quartz and feldspars

groundmass - the matrix of fine-grained crystalline material in which larger crystals are embedded

andosite - dark grayish extrusive rock

batholite, batholith, pluton, plutonic rock - large mass of intrusive igneous rock believed to have solidified deep within the earth

diorite - a granular crystalline intrusive rock

gabbro - one of a family of granular intrusive rocks

pegmatite - a form of igneous rock consisting of extremely coarse granite resulting from the crystallization of magma rich in rare elements

peridotite - a dark coarse-grained igneous rock consisting principally of olivine

rhyolite - very acid volcanic rock

volcanic rock - extrusive igneous rock solidified near or on the surface of the Earth

porphyritic rock, porphyry - any igneous rock with crystals embedded in a finer groundmass of minerals

sodalite - a vitreous mineral consisting of sodium aluminum silicate and sodium chloride in crystalline form; occurs in igneous rocks