Our main materails as following: 1> 100%natural Shanxi black, polished degree above 100. 2> 100%natural Fengzhen balck, polished degree above 100. 3> 100%natural China black, polished degree above 100. 4> 100%natrual Mongolia black, polished degree above 95. Standard Export Packing Inner packing: Foam box or carton Outer packing: Wooden crate
