In the thread on crazy opals someone mentioned cutting sensitive
opals on a glass wheel to prevent the formation of grinding cracks.
Unfortunately I deleted the post. Did I get that right: “glass
This comes as news to me. I’ve never heard of such a thing.
What is it? How does it work? How is it different, (and presumably
better)? Do you apply abrasive slurry to it or is it pre-loaded? How
much do they cost, who makes 'em, where can I get one or at least
Cheers, Hans Durstling Moncton, Canada