Dr. Cool

We’ve scoured the globe and collected the best raw jasper for rock tumbling!

With this professional-grade tumbling set from Dr. Cool, making beautiful gemstones is easy: Just add the polishing grit, water, and unpolished stones into the machine, set it, and wait.

Imagine taking dull, ordinary rocks and magically transforming them into sparkling gems…now you can!

Ensure that you have enough polishing grit for your rock hound adventures with this Discover with Dr. Cool™ Rock Tumbler Refill Grit.

We’ve scoured the globe and collected the best raw gemstones for rock tumbling!