Icyerekezo cya MOS: Urutare rw'ingwa rwa karubonati ya kalisiyumu rwavuye mu bisigazwa by'ibinyabuzima byo mu nyanja byakandaguwe. Ifite ibara rihwanye mu mabara y'umuhondo woroheje, y'ikijuju n'iky'ikijuju cy'ubururu, rikaba rifite ibimenyetso by'ibisigazwa bito. Rikoreshwa cyane mu bwubatsi, mu butaka bw'inzu, mu gupfuka inkuta no nk'igitera gushonga mu gukora icyuma. Rikoroshye kuruta granite, rifite ubwiza bwitonze kandi bwiza.