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Could these be rose-cut diamonds? (plus hallmark help)
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<p>[QUOTE="afantiques, post: 28508, member: 25"]Mostly you don't cut them. You take a little chisel and after careful study,you hit the diamond and break a bit off. Then you use diamond dust to polish the face.</p><p><br /></p><p>Some things are very hard, but they can also be very brittle, especially if they are crystals, which have fracture planes, and that's the point your physicist should have remembered. Who has not seen a diamond ring with a chipped stone in it. Hit them right and they'll shatter.</p><p><br /></p><p>It seems to me, as an afterthought, that given the frail looking old mounts on that piece, there was a chance of the mount breaking and the diamond whizzing into the distance, and also the chance of a slip grinding the mount or frame.[/QUOTE]</p><p><br /></p>
[QUOTE="afantiques, post: 28508, member: 25"]Mostly you don't cut them. You take a little chisel and after careful study,you hit the diamond and break a bit off. Then you use diamond dust to polish the face. Some things are very hard, but they can also be very brittle, especially if they are crystals, which have fracture planes, and that's the point your physicist should have remembered. Who has not seen a diamond ring with a chipped stone in it. Hit them right and they'll shatter. It seems to me, as an afterthought, that given the frail looking old mounts on that piece, there was a chance of the mount breaking and the diamond whizzing into the distance, and also the chance of a slip grinding the mount or frame.[/QUOTE]
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