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Gemstones, Minerals & Fossils
Lapidary
Experiment - cabbed a garnet
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<blockquote data-quote="boobook" data-source="post: 111876" data-attributes="member: 1605"><p>Very nice little cab Lefty, good colour too.</p><p></p><p>Re your spinel problems, could be you are creating subsurface issues with the grade of your cutting laps. Depending on the amount of rough to take off I would start with 600, 1200 then 3000.</p><p></p><p>I have had good polish results on spinel with cerium oxide (which I actually mainly use for opal)</p><p>For cabs, ie opal and other freeform stones, I use a flat leather lap, medium speed with the compound applied by a small spray bottle. Very light touch and don't let the stone get hot.</p><p>mike</p></blockquote><p></p>
[QUOTE="boobook, post: 111876, member: 1605"] Very nice little cab Lefty, good colour too. Re your spinel problems, could be you are creating subsurface issues with the grade of your cutting laps. Depending on the amount of rough to take off I would start with 600, 1200 then 3000. I have had good polish results on spinel with cerium oxide (which I actually mainly use for opal) For cabs, ie opal and other freeform stones, I use a flat leather lap, medium speed with the compound applied by a small spray bottle. Very light touch and don't let the stone get hot. mike [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Experiment - cabbed a garnet
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