| http://www.w3.org/ns/prov#value | - Sounds like you cut it correctly- but Lab is a tricky little animal- I have some of the massive form (used in countertops and such) and it is a bugger to get just right- As for tumbling the stuff- well being a feldspar it does have a good hardness- but being a fedspar it also will cleave (break) on a plane (basically break in a straight line) so it has to be tumbled alone- with lots of pellets- an
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