morsefire
noticing nice landscape pebbles
Member since November 2011
Posts: 83
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Post by morsefire on Sept 17, 2012 7:56:00 GMT -5
Has anyone tried tumbling halved agate with matrix intact?
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Post by johnjsgems on Sept 17, 2012 9:13:21 GMT -5
Not sure what you mean. I've tumbled fire agates in matrix (probably limestone).. The matrix grinds away in a day or two in 60/90. I've done ammonites that had soft matrix on backs too.
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Steve
has rocks in the head
Member since June 2005
Posts: 506
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Post by Steve on Sept 17, 2012 9:40:20 GMT -5
I've tumbled beach agates that still had a lot of the hard basalt matrix. The agate polished, the basalt did not - gave a nice effect -- shinny eyes looking up out of the black.
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morsefire
noticing nice landscape pebbles
Member since November 2011
Posts: 83
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Post by morsefire on Sept 17, 2012 9:54:49 GMT -5
These would be eggs. My idea being slicing them in half to expose the center, then tumble. Otherwise I would end up with shiny black eggs.
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Post by Drummond Island Rocks on Sept 17, 2012 10:11:04 GMT -5
We have tumbled a few egg slices and geode halves that have come out nice. I guess it depends how soft the matrix is. heres an example Chuck
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jspencer
freely admits to licking rocks
Member since March 2011
Posts: 929
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Post by jspencer on Sept 24, 2012 22:11:19 GMT -5
The one on the right is a heel cut that is about 1 1/2"thick with just the one cut face on it. They were done in a vibe and not tumbled to remove crust. I`ve tumbled whole agatized geodes before and exposed the clear interior completely from small geodes with a black crust on them. It took a long time to grind all of the crust off. Attachments:
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chassroc
Cave Dweller
Rocks are abundant when you have rocktumblinghobby pals
Member since January 2005
Posts: 3,586
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Post by chassroc on Sept 27, 2012 12:18:34 GMT -5
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