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Post by Peruano on Nov 5, 2014 18:20:08 GMT -5
Most of the batch of 100% apache tears (obsidian) came out fairly clean, but the largest stones (mahogany excepted) had some frostings to indicate that they needed to go longer or got bruised in the process. Whats interesting is that the one piece of mahogany obsidian (a slabette) on the right side middle ran through the whole process and except for a chip on one edge was fine. The other two pieces of mahogany (upper part of photo) were only thrown in for the polish phase as filler/ballast(skipping the 60/90 2 days, 200 2 days, 500 1 day, and 800 2 days. The bottom line is maybe I didn't need much grinding on my slabettes, or the tears that had not been chipped previously. Go figure. These came through a Raytech Vibe5 vibratory tumbler. Tom Good enough that I will try some more mahogany obsidian slabs.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,275
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Post by jamesp on Nov 6, 2014 2:15:46 GMT -5
The mahogany seems easiest to tumble Tom. The gray and black banded obsidian is worst. It seems to be a softness issue, the grey and black is soft.
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Post by pghram on Nov 6, 2014 14:01:45 GMT -5
Nicely shapped & that slabett you mentioned is really nice.
Rich
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Post by Jugglerguy on Nov 6, 2014 16:20:02 GMT -5
Did you use a vibe or rotary?
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,690
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Post by Fossilman on Nov 7, 2014 10:31:34 GMT -5
Looks like this tumbling has a science to it.....
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