A subsulphate of alumina and potash; alunite. [1913 Webster]

abrading stone, alum, alum root, alum schist, alum shale, amazon stone, ammonia alum, ammonium alum, arch stone, bladder stone, blarney stone, blue stone, caen stone, carved in stone, cherry stone, china stone, chrome alum, cinnamon stone, coping stone, edward durell stone, emery stone, flowering stone, foundation stone, grindle stone, harlan f. stone, harlan fisk stone, harlan fiske stone, harlan stone, i. f. stone, isidor feinstein stone, kidney stone, leave no stone unturned, living stone, lucy stone, moabite stone, new stone age, oliver stone, paving stone, perpend stone, perpent stone, philosopher's stone, philosophers' stone, portland stone, potash alum, potassium alum, precious stone, pudding stone, pumice stone, purbeck stone, ro-setta stone, roche alum, rolling stone, rosetta stone, set in stone, standing stone, stepping stone, sticks and stone, stone, stone age, stone age man, stone bass, stone bramble, stone breaker, stone cold, stone crab, stone cress, stone curlew, stone drill, stone faced, stone facing, stone fly, stone fruit, stone life face, stone marten, stone mimicry plant, stone parsley, stone pine, stone pit, stone plant, stone root, stone wall, swiss stone pine