The Thames & Kosmos Rock Tumbler Refill Pack

• Keep your rock tumbler projects rolling with a 1 lb assortment of natural gemstones including tiger’s eye, aventurine, rose quartz, and more

• Includes a complete four-stage polishing grit set (coarse, medium, fine, and final polish) for professional-looking shine

• Ready-to-wear jewelry settings let you turn polished stones into display-worthy accessories

• Sized and curated for consistent tumbling results in standard hobby tumblers, including the Thames & Kosmos Rock Tumbler

• Great for STEM learning: explore geology, erosion, abrasion, and material science while crafting keepsakes

• Ideal for refills, classrooms, scout projects, and makers who want reliable results without hunting down supplies

Specifications

• Ages: 8+

• Piece Count: 10

• Product Dimensions: 4.5 × 9.6 × 2 in.

• Product Weight: 1.3 lb

• Batteries Required: N/A

• Country of Origin: China

• Year Released: 2025

What’s in the Box?

• 1 lb mixed natural rocks (e.g., tiger’s eye, aventurine, rose quartz, and others)

• 4 polishing grits: coarse, medium, fine, and final polish

• Jewelry settings for turning finished stones into accessories

• Simple usage tips for load sizing, run times, and rinse cycles