Frequently Asked Questions About the Rock Tumbling Process
In addition to the Faqs below please visit our blog posts for more insight or to post yourself.
Why can't I just use sand to tumble?
Though sand may seem like a great grinding material it is not quite as hard as an abrasive media like silicon carbide and it breaks up. So while you could get some results using sand you would be changing the media all the time and for really hard rocks the sand would be grinded more than the rock.
What is the right amount of grit to use?
The commonly suggested amount of grit for initial grind and fine grind is 2 tablespoons per pound of rock in a full tumbler(2/3 to 3/4 tumbler capacity). Depending on the rock type and shape you may use slightly more but usually no less.Our kits are pre-measured for the right amounts of grit.
What is the right amount of polish to use?
The commonly suggested amount of pre-polish and polish for pre-polish and polish steps is 1 tablespoons per pound of rock in a full tumbler(2/3 to 3/4 tumbler capacity). Depending on the rock type and shape and, how well the results in step one and two are, you may use slightly more but usually no less. Our kits are pre-measured for the right amounts of pre-polish and polish.
How can I save money purchasing supplies?
The best way to save is purchasing more at the same time if you can. Our prices provide large discounts for quantities purchased and this is because of the cost of shipping and processing. We still try to keep prices really low for everything to be your most affordable source on any order.
Can I reuse grit?
You can reuse grit especially the coarser grit which will break town into finer grit. However just as you can reuse paper towels you have to subtract the junk from the grit in the slurry and re-screen it to get all the unwanted bits out. You're left with grit but it has a questionable grading (size range). So you are using a grit that you are not quite sure about, how is tumbling time and precision affected. Better to stick with a consistent and reliable new product. Today most people always use new grit for best results.
I have a question not listed above!
Please ask us If you have a question we have not answered. You can submit your question here.
Information about the hardness of some rocks. The MOHS scale rating is here.