I've found a few pumice rocks at the beach, from the size of an egg to about a handball. I've boiled them and left them in diluted bleach for a while to disinfect and clean. Now I'd like to cut some of them into shapes which are easier to handle and just generally nicer. As someone unused to cutting rock of any kind, I wonder about the following and just generally how to handle it:
- Pumice is brittle, sometimes so brittle that I can break it with my hands. Can I hold it reliably with a vice or clamps?
- I've got an angle grinder and a small multi-tool (Dremel). Are both of these suitable?
- What sort of angle grinder disc is suitable? Should I use a standard stone cutting one?
- How dangerous is the dust? Will I need a simple face mask or more comprehensive protection? One source seems to indicate that only long-term inhalation is hazardous.