... 3.own factory 4. 20 years experience Chinese culture stone, culture stone.We supply various culture stone made of quartz, sandstone, slate, granite etc ... requirements.Thickness15-35mm or as your needs.MaterialSandstone, Natural slate stone, Quartzite, etc.ColorFull specification. Such as Rusty, White, Black, Green ... 70% blance against copy of B/L or L/CMOQ100SM chinese culture stone