... absorption Tumbled Slate Materials Available for all other slates, quartzite Character Low Ca , acid-resistant, non-fading Color Black ... / -1 mm Surface Natural face, Matt surface Finished Polished, honed, flamed, etc Packing Wooden crates Price Negotiable Various styles for ... , wall slate, sandstone slate, green slate, natural slate, honed slate, polished slate, etc. We manufacture slate stone in many ...