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• Learn all about the fascinating way rocks are polished in nature, how gemstones are used in jewelry and much more in our full-color learning guide.
NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit – 1Lb. Gemstones and Rocks for Tumbling including Unpolished Amethyst and Quartz – Rock Tumbler Supplies include Rock Tumbler Grit and Jewelry Accessories : Toys
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