Thanks Dan.
Cabochon - "A cabochon, from the Middle French caboche (head), is a gemstone which has been shaped and polished as opposed to faceted."A good pointer, especially for beginners is to
always keep your stones wet when grinding them!Rock dust is very dangerous when inhaled.
Before working stones or turning on my cabbing machine, I spray down the diamond wheels really good to make sure the equipment is wet. I then turn on the bubblers and spray down the wheels again. This will reduce any dust that kicks up when turning it on. Always clean up your work area when done. A safe lapidary artist is a happy one! Good luck with all your future projects.