Rocks for Tumbling
Find tumbling suitability and technique notes for agate, quartz and more.
Not every beautiful rock makes a suitable companion in the barrel. Differences in hardness, cracks and internal structure affect how stones abrade and polish. Mixing incompatible materials can produce disappointing finishes.
What you will find here
Choose a small batch of reasonably similar material and keep notes on hardness and surface condition.
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Compare the type, capacity and compatibility before choosing. An Amazon search opens matching listings; it does not guarantee that any particular item is available or recommended.
Models worth comparing
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How to use this section
Open the most relevant guide below. You can return to this hub at any time using the breadcrumbs, or search the site for a specific model, stone, grit or problem.