Rock Tumbler Refill
The Rock Tumbler Refill is a pack of grinding powders and rocks suitable to refill your Rock Tumbler!
With four grades of grinding powder and rocks waiting to be shined, your refill set will allow your rotatry Rock Tumbler to achieve the perfect polish on your gemstones!
When you tumble the rocks and add the grinding powders, you can make the surface of the rock very, very smooth. Because the rocks are made of compounds of Silica, they will then reflect the light, which is why they become so shiny!
Recommended for ages 8 and up.
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