... stone 3,different colors. We have Grey Quartzite,Black Quarzite and Green Quartzite 1. Size:Gangsaw slab: 2400up X 1200up, ... . 2. Popular finishing: Polished, Honed, Sawn cut, etc. 3.Quality control:Polished degree: Above 85 degree. For black granite, above ... 20mm slab, 15-20 pieces per bundle for 30mm slab, 7-9 bundles in 20' container Chinese Grey/black Quartzite with cheapest price and good quality