First a warning - best to do this indoors so the neighbors don't get worried
about seeing a guy stuffing material into a capped pipe.

What you have in effect is a mortar and pestle similar to the type used in
Africa, rather than the more familiar-looking millstone variety.

"Stuart Johnson" wrote in message
...
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.