Basic Info. Model NO.:Black marble Material: Black Marquina ,Website: , Nero Marquina,Portoro,Silver Dragon Surface Finishing:Polished, Honed, Color:Black Application:Floor, Wall Size:12"x12", 18"x18",18"x36"…etc Density:2.71g/cm³ Thickness:10mm Technics:Natural Marble Slab Quality:High Polished Trademark:Kao Shi Stone Origin:China, Italy Product Description Usage: indoor & outdoor walls, floors,  decoration, etcFinshing: polished, honed, flamed, antique,  etcPopular Size Tile Size1) 305 x 305 x 10mm or 12" x 12" x 3/8"2) 400 x 400 x 12mm or 16" x 16" x 1/2"3) 457 x 457 x 12mm or 18" x 18" x 1/2"4) 600 x 600 x 20mm or 24" x 24" x 3/4"5) Cut-to-size or any other customized sizesSlab Size1) Small Slab: 180up x 60/70/80up x 2/3cm2) Big Slab: 250up x 150up x 2/3cmQuality Standard1) Polished degree: 90 or up2) Thickness tolerance: -2/+1mm, checked one by one by QC during packing3) Diagonal tolerance : +/-1mm4) Surface flatness tolerance: +/-0.3mm5) Adjacent edge verticality tolerance: +/-0.5mm, Precise Cutting by infrared-ray-cut machine  Our products:(1)Sculpture statues gravestone fireplace. (2)Granite and travertine tiles slabs floor wall project. (3)Vanity top countertop tabletop and desk sinks washbasin. (4)Step Railing Stone Border (line) Colum, Arc panel. (5)Garden landscape fountain mosaic pattern,. (6)All kinds of stone products . Please let us know immediately if you are interested in our products. We will send you our price list and sample to you as soon as we receive your specific inquiry. We would like to quote any prices for you.