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Posted in response to Newbie question regarding ruby and sapphire. from Miner John on March 31, 2008 at 07:53:14:

Re: Newbie question regarding ruby and sapphire.

If you are talking about cleaning off matrix from a corundum crystal, tumbling will likely do the trick. However, when the grit gets to the actual crystal it is basically just going to smooth and clean it a bit as the silicon carbide grit is much softer than the corundum.

From jack king - March 31, 2008 at 09:23:14

Message: 66298

Message Index Start New Topic Photo Gallery FAQ and Use Tips Bob's Rock Shop

Bob Keller