Blue Marble National Geographic Rock Tumbler Refill Kit — 5 lb Rocks, Grit & Jewelry Settings

Unlock hands-on science and creative spark with Blue Marble

Immerse curious minds in the tactile world of color, texture, and pattern. The Blue Marble National Geographic Rock Tumbler Refill Kit combines tangible rock materials with a guided learning approach, turning rough stones into smooth treasures through safe, kid-friendly polishing. This kit is built for exploration, whether you’re a student, a parent, or a budding hobbyist seeking a constructive, screen-free activity that fosters focus and curiosity.

With 5 pounds of unpolished rocks and gemstones sourced for variety, you’ll experience a spectrum of hues and textures. The kit includes 2 pounds of gemstone mix, 1 pound of agate mix, 1 pound of Madagascar mix, and 1 pound of jasper mix, offering a robust assortment for different tumbling results. Twenty grit packets provide enough material for five complete tumbling cycles, giving you the chance to refine technique and experiment with finishes over time.

What’s inside

• 5 pounds of unpolished rocks and gemstones in mixed assortments
• 20 grit packets for five tumbling cycles
• 5 jewelry settings for easy keepsake projects
• Storage pouch to keep specimens organized
• Detailed learning guide with polishing instructions and stone facts
• Backed by Blue Marble’s commitment to quality and service

Why it appeals to learners and makers

• Hands-on exploration of color, texture, and pattern across multiple stone types
• Step-by-step polishing guidance complements classroom and home learning
• Creative outlet for making personalized jewelry or display pieces
• Clear organization of materials helps ease family or classroom projects
• Safe, tactile activity that supports patience, focus, and practical skills

Blue Marble stands behind its products with responsive service. If your experience falls short of expectations, reach out and we’ll make things right. This kit is designed to be a flexible, kid-friendly introduction to rock polishing, offering opportunities for curiosity, patience, and achievement.