anthracite /ˈænθrəsaɪt/ antracita [un tipo de carbón duro] He brought a lump of anthracite coal.
basalt /ˈbæsɔːlt, bəˈsɔːlt/ basalto The durability of basalt gives it great value for erosion protection.
bauxite /ˈbɔːksaɪt/ bauxita Mining bauxite is very damaging, and producing aluminum requires an enormous amount of energy. ^ bauxite deposits
chalk /ʧɔːk/ tiza Many of the older mansions above the chalk cliffs fell into semi-ruin during the Communist era.
conglomerate /kənˈglɒmərət/ conglomerado Some pieces of the statues - hewn from the soft, conglomerate rock 1,500 years ago - have shown up for sale in Pakistan.
diorite /ˈdaɪəraɪt/ diorita a life-size black diorite statue
granite /ˈgrænɪt/ granito It's hard to fathom the amount of physical labor that went into chipping this church out of solid granite with nothing but hand tools.
gneiss /naɪs, gəˈnaɪs/ gneis A river's abrasive power acts slowly on hard rocks, such as granite and gneiss. ^ a piece/chunk/fragment of gneiss
flint /flɪnt/ pedernal, sílex flint implements ^ Quarrying and manufacture of flint weapons were among humankind's earliest business ventures.
limestone /ˈlaɪmstəʊn/ piedra caliza We went to a sea cave carved out of the steep limestone cliffs.
marble /ˈmɑːbəl/ mármol marble statues
obsidian /ɒbˈsɪdiən, əb-/ obsidiana Obsidian will shatter at a blow into razor-sharp splinters.
pumice /ˈpʌmɪs/ (also pumice stone /ˈpʌmɪs ˌstəʊn/) piedra pómez I saw a pumice in the bathroom.
sandstone /ˈsændstəʊn/ piedra arenisca The walls of red sandstone were up to 20 feet thick, surrounding the strong 12th-century keep.
schist /ʃɪst/ esquisto [roca metamórfica] The Wilson massif is known for crumbling schist and a lethal mixture of rock, ice, snow, and exposure.
shale /ʃeɪl/ esquisto [roca sedimentaria] They climbed back up the slope, loose stones and shale slithering and clattering away under their feet.
slate /sleɪt/ pizarra We stayed in a traditional stone and slate cottage.
