I know someone has already etched on rocks before but I thought I’d see how deep I could try to that engraving to go… the answer is, not deep at all… you could say that I barely scratched the surface.
Its engraved enough to make decent images but I could not get it to go any deeper. I used the (latest) dark image setting on the first pass. Then I used the same setting and changed the lines per inch to max, power was already 100%, but this 2nd pass barely made any difference at all. I guess it all depending on the rock too though.
FYI the black honeycomb pattern on the crumb tray makes for an excellent background!