1. Natural Slate, Natural and bright color; 2. Green materials, Non-Antacid, Non radiation, wearproof, etc. 1.regular size:3-5cm,5-8cm,8-10cm2.color:red,black,green,yellow,white ,ect3.surface:machine and natural4.pakage:bag and wooden case5.features:low water absorption,anti-freeze6. Widely used in public facilities,visas,courtyards,gardens,etc.to make a natural and vogue effect. Called green ...