I love this!!! Thinking my Grandson would love to see “Ben” when we picked up a rock outside!
Growing up my Mom collected rocks from everywhere across the country. They built an entry room, hand laying rocks & bottles (end to end to add light to the room). They also added a couple of regular windows. The inside of the walls were coated to bring out their color to look wet. It was pretty cool.
So great to see those results! We up here in Maine have beautiful rocky coastlines and over the years my family and I have been known to be rock smugglers from time time. We have so many that my wife wants to make a fairly large rock garden and she had more than enough for one. So boy was she excited when she knew we could engrave rocks with the . See the criminals below! My inlaws, wife and daughter! (We didn’t actually take any rocks from that particular beach, orrrrrr did we?)
Yes, different minerals react differently and the only way to know is testing. Most often I see a bleaching effect, but on granite I think it is the the hornblende that darkens. So for consistency a stone without any matrix in it would give better results.