Black good natural rough crystal quartz 1.CE&Experience Qc team 2.Best quality 3.Factory ... , shell chips and glass piecesAvailable FinishPolished ,Honed,Flamed,Bush Hammered,Rough Picked,Chiseled,Leather Finished,Antique Finished,Sandblasted, Acid treatment etc ... .1.2cm,1.5cm, 1.8cm, 2cm,3cm, etc.Other cut to size as 600*600,800*800,1000*1000,1200 ...