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Gemstones, Minerals & Fossils
Lapidary
Star sapphire cab
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<blockquote data-quote="Lefty" data-source="post: 155229" data-attributes="member: 2976"><p>Cheers guys. As usual, the camera doesn't show what the eye sees. The star is actually more sharply defined than in the photo and the cracks are extremely fine and not easily noticable. The camera has downplayed the best feature while accentuating the worst :/</p><p></p><p>If you're going to do one Varts, definately no fixed grits over #600 (I only took them from shaping on a #220 cabbing wheel to finer shaping on a #280 resin-bonded wheel, then everything was loose grits in grooved cabbing laps and finally to #60 000 on a cabbing machine polishing pad. Seemed to work quite well. It was proving impossible to pre-polish on the finer resin-bonded cabbing wheels so I did a bit of research and found the loose grits piece of advice. I tried it and it sorted the problem straight away.</p></blockquote><p></p>
[QUOTE="Lefty, post: 155229, member: 2976"] Cheers guys. As usual, the camera doesn't show what the eye sees. The star is actually more sharply defined than in the photo and the cracks are extremely fine and not easily noticable. The camera has downplayed the best feature while accentuating the worst :/ If you're going to do one Varts, definately no fixed grits over #600 (I only took them from shaping on a #220 cabbing wheel to finer shaping on a #280 resin-bonded wheel, then everything was loose grits in grooved cabbing laps and finally to #60 000 on a cabbing machine polishing pad. Seemed to work quite well. It was proving impossible to pre-polish on the finer resin-bonded cabbing wheels so I did a bit of research and found the loose grits piece of advice. I tried it and it sorted the problem straight away. [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Star sapphire cab
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