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Gemstones, Minerals & Fossils
Lapidary
Help regarding copper laps and other questions
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<blockquote data-quote="Debbie K" data-source="post: 349488" data-attributes="member: 10510"><p>Lefty:</p><p></p><p>I've got Guerrero topaz, which is crystal, some clear and irradiated blue, both tumbled and crystal. So I've got plenty to choose from. I even have some really pale pink and yellow topaz.</p><p></p><p>You know, you got me wondering and now I'll have to pull out the polariscope soon to see if the C axis in topaz behaves the same way quartz does. If so, it might be fairly easy to determine where the planes are on the tumbled ones and cut accordingly.</p><p></p><p>It's good to know that the topaz isn't all that tricky. Knowing me, I should aim for the cleavage plane to be level with the table; I start with the pavilion and once I transfer, it seems the stones always have to have the table adjusted. Just joking, but I will have to be mindful about how much I adjust.</p><p></p><p>I messing about with the "new" old machine and the cheater is driving me crazy. It seems to only move not at all or way too much. I'm trying to figure out a way to make it more sensitive. I found that the bed isn't quite level, and spent some time adjusting that. My Graves was a left-handed machine, and this one is right-handed. I find that I can't easily adapt and I want to use my left hand to facet, and it's awkward. </p><p></p><p>The copper plates, on the other hand, are working out great. I have three left that I'm saving for yet to be determined grit. And, the bonus is that I have 6 corian laps, too!</p><p></p><p>Debbie K</p></blockquote><p></p>
[QUOTE="Debbie K, post: 349488, member: 10510"] Lefty: I've got Guerrero topaz, which is crystal, some clear and irradiated blue, both tumbled and crystal. So I've got plenty to choose from. I even have some really pale pink and yellow topaz. You know, you got me wondering and now I'll have to pull out the polariscope soon to see if the C axis in topaz behaves the same way quartz does. If so, it might be fairly easy to determine where the planes are on the tumbled ones and cut accordingly. It's good to know that the topaz isn't all that tricky. Knowing me, I should aim for the cleavage plane to be level with the table; I start with the pavilion and once I transfer, it seems the stones always have to have the table adjusted. Just joking, but I will have to be mindful about how much I adjust. I messing about with the "new" old machine and the cheater is driving me crazy. It seems to only move not at all or way too much. I'm trying to figure out a way to make it more sensitive. I found that the bed isn't quite level, and spent some time adjusting that. My Graves was a left-handed machine, and this one is right-handed. I find that I can't easily adapt and I want to use my left hand to facet, and it's awkward. The copper plates, on the other hand, are working out great. I have three left that I'm saving for yet to be determined grit. And, the bonus is that I have 6 corian laps, too! Debbie K [/QUOTE]
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Gemstones, Minerals & Fossils
Lapidary
Help regarding copper laps and other questions
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