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Posted in response to Re: Re: Re: Rock crushing from Alan on June 07, 2007 at 21:28:16:

Re: Re: Re: Re: Rock crushing

Specimen trimming depends a lot on what the specimen is in. If it is in a boulder or large rock, one might start with a sledge hammer and wedges to split the piece out. The whole idea is to reduce the size of the rock that the specimen is in.

When it gets down to a manageable size, it is a good idea to switch to crack hammer and chisel and then maybe a geopick and chisel.

For controlled trimming of pieces about 4" or less, a lot of collectors use a device that has opposed chisel points with one stationary and the other driven by a screw. The points are set where the break is desired and the screw tightened in stages until the rock breaks. For smaller pieces, end-nippers with long handles work well.

From Don Peck - June 08, 2007 at 11:47:39

Message: 64271

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