After being inspired to try laser designs on anodized aluminum and then black granite, my dad pulled out a box of polished agate stones that had been given to him by another artisan. The stones had waited 50 years for the right project to come along, but after our first test we were convinced they’d found their purpose. I had a lot of fun creating designs that fit each stone’s unique shape, and learning how to read the stones to predict where the engraving might get rough due to subsurface imperfections.
I settled on Speed 800, Power 900, DPI 340 for most of these, resulting in a 3-4 minute job per stone.
@kittski did the first agate engraving I remember seeing here. In fact, I think their avatar used to be a dog skeleton engraved into agate. Be interesting to check out how those settings compare with yours. I did a little with it years ago, but nothing like what you’ve accomplished. Kudos on your results!
Nice, I’ve done a lot of stones and I’m surprised how many engrave well.
I engrave Selenite and to get focus I lay a small scrap of paper on the piece. The laser uses the paper to catch focus and then the fan on the head blows the paper off the piece as it engraves. It works pretty well.