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Last summer, I went to Lake Superior and found a few rocks. In this video, I tumble those rocks.
Here’s the recipe I used to tumble these. It’s the same one I use for just about everything.
Rotary tumble using coarse grit, such as 46/70 silicon carbide. Check rocks weekly and set aside any that are acceptable. There is no set time for this. Each rock runs as long as necessary.
2 days with 2 Tablespoons 220 or 120/200 silicon carbide grit
3 days with 1/2 teaspoon 500 aluminum oxide grit and 1 tablespoon borax
2 days with 1/2 teaspoon aluminum oxide polish and 1 tablespoon borax
Optional: burnish for 2 hours or more in 2 tablespoons of borax
Videos showing where I picked these rocks up:
Grand Marais: https://youtu.be/sJid0SyHXMs
Perry’s Landing and Two Hearted River: https://youtu.be/yIp4BWau030
Vermillion Point: https://youtu.be/WSYcLOfekm4
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