This is basically the approach I have tried. I even had the neighbors
teenaged son have a go with a 10 pound sledge and all that happend was
that he bent the smaller pipe. All we got was a couple chips off the stone.

I've done malichite with this rig with no trouble

Stuart Johnson wrote:
First a little warning.. I have not tried this.

Buy a large piece of iron pipe and an end cap to use as a container. Get a
send piece of pipe and with end caps that will fit inside the larger piece. I
don't know if close fit or very small fit would be best. Use caps on both
ends of the smaller pipe. Drop the lapus nuggets into the large piece and use
the smaller to crush using a hammer if needed.

Stuart Johnson
Red Oak, Texas

In article rwU5d.125625$D%.85245@attbi_s51, william kossack
wrote:

I have some lapus nugets that I would like to break up and use in a
couple projects.

The only problem is that short of taking it out onto the sidewalk and
hitting it with a sledge hammer the stuff will not break.

Any suggestions?