Finally got around to testing some glass! Wife was using these cheap glass “gems” to add weight to her crochet projects, and some of them were painted on the top vs the bottom, so I decided to finally test on glass. First one, naturally as seen, is on dark blue. Didn’t expect to work as well as it did (given the laser is blue). 500mm/min, 0.2mm interval (a bit rough for the 10W).
Second one was a very light blue, no picture of the original colour, but I washed it with acetone afterwards. This one was done at 0.15mm interval, can likely still go slightly finer.