Rock Tumblers: Discover the beauty of rocks and minerals!

Rock tumblers are machines used to smooth and polish rocks to reveal their hidden beauty. They are used to produce tumbled stones for jewelry, craft, lapidary, and education use.

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Amethyst is the February birthstone. It is quartz, with some impurities such as iron that make it purple. This is from a …

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Rock Tumblers: Discover the beauty of rocks and minerals!

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