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Post by knave on Apr 6, 2020 14:37:13 GMT -5
rockjunquie MsAli NDKI don’t know what this material is, just found it in a box of end cuts, it seems kind of soft, any tips on cabbing?
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Post by rockjunquie on Apr 6, 2020 14:38:57 GMT -5
I would say chrysocolla ad tenorite. Great cab, BTW!
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Post by knave on Apr 6, 2020 14:41:24 GMT -5
I would say chrysocolla ad tenorite. Great cab, BTW! Thanks! It’s kind of a thick piece, 3/8” or more. I marked the girdle by laying a #2 pencil flat, which is not even 1/2 way up the side. Should I go for a high dome, or just grind it all down? -newbie |
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Post by rockjunquie on Apr 6, 2020 14:43:12 GMT -5
I would say chrysocolla ad tenorite. Great cab, BTW! Thanks! It’s kind of a thick piece, 3/8” or more. I marked the girdle by laying a #2 pencil flat, which is not even 1/2 way up the side. Should I go for a high dome, or just grind it all down? -newbie It's up to you how you want to cab it. I like to go with a flatter dome myself, but I'll do a high dome if it's really thick or if I don't want to lose the pattern. |
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Post by knave on Apr 6, 2020 14:47:12 GMT -5
I appreciate the help Tela! I’m going to run this through the expando belts, I have most all of them up to 1000 SiC. After that, I’m not sure it I should try a polish wheel or throw it into the loto.
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Tommy
Administrator 
Member since January 2013
Posts: 12,987
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Post by Tommy on Apr 6, 2020 14:48:46 GMT -5
it seems kind of soft, any tips on cabbing? I don't know what your experience level is so I don't want to insult your intelligence but with a softer Chryso type material I have found that less is more on the polishing attempt. Some of these copper based material are just not going to take a glossy shine period, regardless of our efforts. The magic number seems to be in the 3000 grit range and if pushed past that the shine seems to regress and go backwards - especially if I try my usual AO polishing method that makes most materials pop. |
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Post by knave on Apr 6, 2020 14:56:02 GMT -5
Tommy I’m as green as it gets with cabbing. Definitely in the learning stage. I’ve had chrysocolla in quartz that took a good shine but this is much different. How taboo is the vibe? If you had 80 hard, expando, felt polish pad, and LotO, what would you recommend?
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Post by rockjunquie on Apr 6, 2020 15:11:22 GMT -5
Some of them will undercut as well. I wouldn't tumble it. Go easy like Tommy says. Although, I have had good luck with a semi decent polish on my diamond wheels up to 100k. But, it seems to me nearly every chrysocolla (copper complex) is different.
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Post by knave on Apr 6, 2020 15:13:35 GMT -5
Thank you. I’m under no illusions of winning anything here but this is how I learn. Get the hands dirty.
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Post by MsAli on Apr 6, 2020 15:14:58 GMT -5
Evan, I agree with Tommy on this. To me less is definitely more. I've had better luck with stuff that's been stabilized.
But that could be because of my inexperience
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Tommy
Administrator
Member since January 2013
Posts: 12,987
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Post by Tommy on Apr 6, 2020 15:22:57 GMT -5
Tommy I’m as green as it gets with cabbing. Definitely in the learning stage. I’ve had chrysocolla in quartz that took a good shine but this is much different. How taboo is the vibe? If you had 80 hard, expando, felt polish pad, and LotO, what would you recommend? With Expando all you really can do is go up to 1000 SiC, unless you have diamond belts in higher grits than 1000. If it were me on a chryso material I would try to roll with the most worn out belts I had for the lower grits because SiC belts are pretty aggressive. Go up to 1000 then experiment with the polishing pad. I've never had success tumbling any copper based materials. Vibe tumbling is violent in a gentle sort of way. As you progress up in grits (usually around 500) the harder material stops being removed but any softer areas will continue to get eaten away. Same thing on certain types of moss and plume agates - where the plume reaches the surface the loss of material (undercutting) continues well after the main material loss stops. |
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Post by knave on Apr 6, 2020 15:50:36 GMT -5
Added pics of dome after 400 sand, wet.
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NDK
Cave Dweller 
Member since January 2009
Posts: 9,440
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Post by NDK on Apr 6, 2020 16:24:57 GMT -5
knave I'm with the others, Evan. Sometimes a matte finish on a cab is sufficient. I'd run it through the 1000 belt and see how it looks. BTW it's looking pretty dang good so far!
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Post by MsAli on Apr 6, 2020 19:09:59 GMT -5
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Post by fernwood on Apr 7, 2020 1:36:20 GMT -5
Nice looking cab. Looks like you achieved a glossy finish. Well done.
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Post by knave on Apr 7, 2020 14:54:08 GMT -5
  Edit, changed first picture. |
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Post by miket on Apr 7, 2020 14:55:57 GMT -5
 Love it! Great job, Evan!
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Tommy
Administrator
Member since January 2013
Posts: 12,987
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Post by Tommy on Apr 7, 2020 15:06:12 GMT -5
Nice job sir! That's a great shaped dome and girdle. It's not easy getting softer materials to keep a uniform girdle, let alone doing it with a pointed end. |
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Post by knave on Apr 7, 2020 15:14:06 GMT -5
Thank you. I see I didn’t get the focus right on the first pic. I may replace it yet.
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Post by MsAli on Apr 7, 2020 15:30:02 GMT -5
Beautiful job Evan!
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