VEVOR Laser Engraver, 10W, Laser Engraving and Cutting Machine with Enclosure, Laser Cutter Engraver Machine, 300 x 300 mm Working Area, 7000 mm/min, for Wood, Leather, Glass, Certain Metal, Class 1

Dear Customer, Thanks for your inquiry. It is not suitable to carve directly on the glass. You can use a marker to blacken it, or stick a thin black glass adhesive paper on it before carving.