Chinese Mongolia Black Basalt 1. Own quarry and factory 2. Strong and hot sale material ... Black,China Black,Absolute black slab,tile,countertop,steps,etc.1>.Finishing : polished tile, flamed tile, honed tile,bush-hammered tile ... ''d). 600 x 600mm or 24'' x 24''f). Thickness : 1.0cm, 1.2cm, 1.5cm, 1.8cm. 2.0cm, 2.5cm, 3.0cm, etc ...