... high temperature 4.acid resistatance 5.healthy to human sahara crystal quartz sand;black quartz sandproduct information: 1.material:quartz ... vacuum and vibration process under high temperature.3.process way:top polished surface+bevelled/bullnose/R Round edges etc.according ... ,white,red,orange,pink,etc.9.usage Kitchen countertop, vanity top, vanity panel, floor tile, wall tile,bathroom panel, star ...