Rock Tumbler - eredu36793
|The Elenco Rock Tumbler is just what you need to reveal amazing colors and patterns with a glass like finish. Tumbling is easy just place a few rocks or minerals into the tumbler with some grinding power. Unlike other tumblers you select the length of time to tumble the longer the time the shinier the rock. Includes 8 ounces gemstone rocks 2 - Step 1 coarse grinding powder 2 - Step 2 fine grinding powder 2 - Step 3 polishing powder. The Elenco Rock Tumbler is recommended for ages 10 and up. Uses AC adapter which is included.|
This hands on project enables students to examine and identify ...