Got some inspiration with the results of trials by @VinVenture.
I had two things I wanted to see done like this.
Underwhelmed yet pleased, but this is from my design choices more than the process.
Focus on slow speed/high power Cut. Anything less just looks like scratches and you want the heat to glass the sandstone.
Avoid the edges. Too near and the heat absorbed will cause stress cracks.
Keep it simple. Even though I converted my designs to a single line format to cut fast, one was still too complex for this format and the other was okay but nearing too complex. If your design resembles the Nazca Lines in Peru like VinVenture’s did, you will be pleased.
All in all, some fun experiments. I have seen similar results with some other stone (maybe was a shale). If you liked the results shown and have some simple designs that interest you, sandstone is cheap, easy to find, absorbs liquids spills, and is usually ready to go as a coaster.