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Rock Polishing And Cutting Hobby

NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit - Includes Rough Gemstones 4 Polishing Grits Jewelry Fastenings Learning Guide Great Stem Science Kit. 4.5 out of 5 stars. 14371. 59.99. 59. . 99. This kit comes with everything you need to make various kinds of gemstones and rock crystals. It also has a detailed guide to help make the process .

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