1) Natural stone by polished, no dyeing , ... degreeTolerance of thickness:1cm:+/-0.5mm,1.8cm:+/-1mm, 2cm:+/-2mm2 Materials:black granite, Shanxi black, china black, ... us Our company supply black granite(Shanxi black, China black, HEBEI black)tombstone and monument, grave stone, headstone ... have experience of 10 years on tombstone & monument carving.3there’re various designs and dimensions of tombstone ...