chinese culture slate stone 100% natural material and permanent beauties Color, size as your requirement ISO approval chinese culture slate stone1. Finishing: natural, honed2. Optional colors: black, rusty, green, grey, yellow3. Standard sizes(mm): 200*400, 400*400, 300*300, 300*600, 600*6004. Thinkness: available range from 10mm to 40mm5. Usage: wall decoration