National Geographic JM80570M Rock Tumbler Starter Set – Educational Rock Polishing Hobby Kit with Noise Reducing Drum, Gemstones & Grit, Jewellery Settings & Full Colour Guide – Science Kit – STEM

Directions 1. Remove the rock tumbler from its packaging. 2. Assemble the rock tumbler according to the instructions provided in the full color guide. 3. Place the rough gemstones and grit into the noise reducing drum. 4. Fill the drum with water up to the fill line. 5. Secure the lid onto the drum. 6. Plug in the power cord and turn on the rock tumbler. 7. Allow the tumbler to run for the recommended time (usually 7-14 days) to polish the gemstones. 8. Once the polishing process is complete, turn off the tumbler and unplug the power cord. 9. Carefully remove the lid and pour out the polished gemstones. 10. Clean the drum and all removable parts with warm, soapy water. 11. Set the polished gemstones in the jewellery settings provided.