material consisting of the aggregate of minerals like those making up the Earth's crust

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

a small stone tool usually made of flint or chert and typically a centimetre or so in length and half a centimetre wide.

a dark grey volcanic rock

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

(geology) the matrix of fine-grained crystalline material in which larger crystals are embedded

dark greyish extrusive rock

large mass of intrusive igneous rock believed to have solidified deep within the earth

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

a small stone tool usually made of flint or chert and typically a centimetre or so in length and half a centimetre wide.