Henry
spending too much on rocks
Member since January 2013
Posts: 452
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Post by Henry on Mar 15, 2013 20:21:41 GMT -5
Well, after several months of agonizing tumble of San Luis Obispo beach stones and rose quartz from Charlevoix Québec, i've decided to crush them and start over as smaller stones. There were huge cracks in these larger stones and the more I tumbled the worse they became. I decided to buy some blue quartz from the "Rock Shed" to tumble them all together. I'll post some before pictures once I receive them through the mail. Also, is it relatively safe to tumble jasper, chert and rose/blue quartz together? Are they relatively close in hardness?
Henry
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Post by susand24224 on Mar 15, 2013 20:41:33 GMT -5
I would not recommend tumbling the blue quartz and rose quartz with jaspers or chert. They are about the same hardness, but rose quartz and blue quartz are considerably more brittle and need much more babying than chert and jaspers.
Two other things: Many things that are called jasper really are not--and are softer. Also, the blue quartz from the Rockshed is one of the more difficult tumbles I have done.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,179
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Post by jamesp on Mar 16, 2013 9:06:42 GMT -5
I try to break fractured rocks in the first grind so the broken off pieces will grind smooth(catch them early).And grind them off if they are shallow fractures.
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