Teach Art At Home Like an Artist!
When you tumble rocks, you should always put rocks of similar hardness together. Mixing hard and soft rocks will bring discouraging results. So, a beginning rock tumbling hobbyist needs to know how to determine a rock’s hardness.
In the video, Jim refers to the Mohs Hardness Scale and posts a chart. Here’s a link to the chart, from the U.S. National Park Service: https://www.nps.gov/articles/mohs-hardness-scale.htm
Here’s last week’s video, in case you missed it.
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