What Are The No-No's Of Tumbling?
How can I know what I can put in the tumbler and with what tumbling material for a particular stone or metal?
I need to know what I can clean in the tumbler.
I would like to do lapidary work, but the materials seem expensive to wash down the drain every time.
Also, I have a diamond tester, can I use it to find out the Mohs hardness of a stone and go from there?