jmyers
off to a rocking start
Member since October 2007
Posts: 20
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Post by jmyers on Apr 9, 2008 19:46:33 GMT -5
After a down period of 2 months due to Chicago Electric tumblers dying at the same time, I have finally received by new Thumlers Tumbler. I have a batch of Lapis Lazuli that did great through the first three stages, shaping and smoothing out. However, I have run it through three weeks of polish, using Tin Oxide with plastic beads and it looks no different.
Is there a trick to the final polish, or a better polish for this type of stone?
Thanks in advance,
Jeff
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rallyrocks
fully equipped rock polisher
Member since November 2005
Posts: 1,507
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Post by rallyrocks on Apr 9, 2008 19:51:56 GMT -5
Ive only been able to get Lapis really shiney on a lap with diamond compound. I'd be surprised to hear that it can be successfully tumble polished because of the different hardness' of the constituent minerals, but maybe other people know better....
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luv2hound
freely admits to licking rocks
I try & I try, but dang it! Those rocks just keep ending up in my pockets
Member since June 2007
Posts: 890
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Post by luv2hound on Apr 10, 2008 13:28:20 GMT -5
Hi Jeff. I have a piece of lapis that I got pretty shiny. I did it on the cabber. I used cerium oxide on the leather to get my shine. (I know, I know, I still havent switched to diamond paste, but will soon) Maybe cerium would give you a decent shine in the tumbler?
~~Mitzi~~
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mike4bears
spending too much on rocks
Member since December 2007
Posts: 275
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Post by mike4bears on Apr 15, 2008 21:19:14 GMT -5
Jeff give chrome oxide a try. and i have used zam on a muslin buffing wheel.
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