... High hardness, Good Wear Resistance 2.Pure raw material, environment-friendly Stone Name: raw quartz stone balck galaxy Quartzite stone are widely ... or to order THICKNESS :15-30mm or to order MATERIAL :natural slate, sandstone, quartzite etc. COLOR :Beige, rusty, white, ... take out the ineligible pieces. 1) More than 93% natural quartz powder2) Hard enough to avoid any scratches. The surface scratch ...