Granite laser engraving machine 1)shadow engraving 2) cost of photo engraving is 0.16USD 3)photo engraving on the tombstone stone laser engraving machine This machine, with its software and hardware connected to a computer, can complete mechanical movements. It can engrave portraits, patterns, and characters on the stones. The max engraving depth is 0.3mm. Type ParameterBX 90*60BX 120*80BX 150* ...