Polished Jack Black Natural Slate Stone for Flooring, Roofing, Wall

We are offering jack black natural slate stone. quality : variations in color tone and disseminated minerals exist available in following surface finishes » both sides natural » one side natural and one side calibrated » one side polished and one side calibrated » one side natural & one side polished/honed edges » only machine cut edges (sawn) tiles size in cms » 30x30, 30x40, 40x40, 40x60, 60x30, 60x60 cut to size tiles strip size in cms » 30x20x1, 30x15x1, 30x10x1 thickness » 10-15mm, 12-18mm, 12-18mm, 12-18mm, 12-18mm, 12-18mm, 12-18mm with tolerance of ±5mm (for both sides natural and one side natural & one side polished/honed) » 11mm to 12mm with a tolerance of ±1mm (for one side natural & one side calibrated and one side polished and one side calibrated)