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Rock Tumbler Refill – Raw Gemstones of Nine Varieties (1lb)

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MSRP:  $14.99




  • PREMIUM GEM ASSORTMENT – One pound of raw gemstones: Tiger’s Eye, Amethyst, Aventurine, Rose Quartz, Red Jasper, Agate, Sodalite, Dalmatian Jasper, Hematite

  • POLISHING GRIT – Four stages of grit: course, medium, fine, polish. The perfect medium to turn your “stones” into “gemstones”!

  • MAKE YOUR OWN JEWELRY – We’ve included jewelry fastenings (2 necklaces, 2 earrings, keychain, and ring) so you can design your own custom jewelry

  • LEARN ABOUT GEMSTONES: Discover with Dr. Cool’s adventure guide is written by teachers and will teach you many amazing facts about these 9 incredible gemstones

  • AWARD-WINNING QUALITY - Join the 1000's of parents who have chosen our award-winning science toys, and rest assured with our 100% satisfaction guarantee



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


This rock tumbler refill kit includes:

  • The ultimate variety with 9 types of raw gemstones (1 lb in total)

  • 4 courses of premium polishing grit that will turn your “stones” into “gemstones”

  • Jewelry fastenings: 2 necklace, 2 earring, 1 keychain, 1 ring

  • Discover with Dr. Cool’s education adventure guide written by teachers


Boys and girls will love witnessing the incredible transformation of these gemstones and adding them to their rock collection!



A Brand You Can Trust


Discover with Dr. Cool is a name parents trust.  Founded by a teacher and a life-long rock hound back in 2009, Dr. Cool has won over 100 awards for the play value, educational content, and overall quality of their toys.  These awards include:


  • 10 Best Toys for Kids - Dr. Toy

  • Kid's Product of the Year - Creative Child Magazine

  • Award of Excellence - Parent Tested, Parent Approve

  • Best of the Year – Family Review Center

  • Brain Toy Award – Academic’s Choice

  • Brain Child Toy Award – Tillywig Toy

  • Teachers Choice Award - Learning Magazine


All Discover with Dr. Cool products are backed with a 100% satisfaction guarantee, so you know you’re giving a quality gift that any child will love!


Science doesn’t get any cooler than this!

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