Smithsonian Rock Tumbler Books Each piece highlights the careful

Each piece highlights the careful craftsmanship that makes it both practical and decorative

atomic number 18)

and crystals

Featuring detailed illustrations of various freshwater fish

Smithsonian Rock Tumbler Books Each piece highlights the carefulTurn rough rocks into beautiful, polished stones that you can use to make charms, bracelets, keychains, and more. Begin by tumbling the included rocks in a barrel with water and grit, then repeat this cycle using progressively finer grits. In just weeks, the Smithsonian Rock Tumbler mimics the process that takes oceans thousands of years! Turn rough rocks into beautiful, polished stones! Includes accessories to make charms, bracelets, and keychains.