Iyo bigeze kugera kuri marble na granite hejuru, kugira ibikoresho byiza ni ngombwa. Abapolisi ba granite ya Marble bava mu Bushinwa bashimishije cyane mubikorwa no gutunganya, cyane mubice byibikoresho byamashanyarazi. Ibi bikoresho bishya byashizweho byumwihariko kugirango byuze ibyifuzo byo gushushanya amabuye, bitanga abakoresha hamwe