Rock Hardness - Mohs Chart

The MOHS chart is a guide to how hard rocks are. Find the chart here. You can use it to keep the right rocks together when tumbling. We have talked about the importance of keep the right barrel mix in another blog. The chart will help you group your rocks and pick the correct grit for tumbling. Knowing how hard your rocks are tells you what you may expect in terms of how long the rock tumbling process will take.

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