Glass engraving is my hobby from many years ago.
Almost all pieces I made was gifts to somebody.
I use diamond drill to make any glass engraving. It is also possible to engrav on stone, wood or any similar material.
Glass engraving is interesting hobby and material for engraving is not so expensive, but it takes practice and a lot of effort to learn engraving. It takes a steady hand and good vision, or good glasses on your nose. 🙂
Here are some pictures of my earlier Glass engraving work.