The Thames & Kosmos Rock Tumbler Refill Pack

Name: The Thames & Kosmos Rock Tumbler Refill Pack
Brand: Thames & Kosmos
SKU: 210000074751
Price: 11.03 USD
Availability: InStock
Rating: 4.6 (5 reviews)

The Thames & Kosmos Rock Tumbler Refill Pack - Main image

The Thames & Kosmos Rock Tumbler Refill Pack - View 2

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$11.03 ~~$15.99~~ In stock

Category: 8-10 Years

Keep on rockin’ and rollin’ with this refill pack for the Thames & Kosmos Rock Tumbler. This pack includes a one-pound assortment of natural rock samples — including tiger’s eye, aventurine, rose quartz, and more — as well as four polishing grits. Use the included jewelry settings to create accessories from your specimens.

From Thames & Kosmos, for ages 8 and up

Product Details

Ages: 8+
Piece Count: 10
Product Dimensions: 4.5 x 9.6 x 2 in.
Product Weight: 1.3 lbs.
Batteries Required: N/A
Country of Origin: China
Year Released: 2025

Customer Reviews (4.6 / 5 · 5 reviews)

Elizabeth F. ★★★★★ Sep 10, 2026

The one-pound mix is a solid variety, and the tiger's eye pieces came out with a really nice shine after the last cycle. My kid went straight for the rose quartz in the batch, so the assortment kept him busy for weeks.

Daniel ★★★★★ Sep 9, 2026

My grandson and I were thrilled to find tiger's eye and rose quartz in the mix—the colors really pop once they come out of the tumbler. This one-pound refill bag is the perfect size to keep our machine busy for another round of shiny discoveries.

Andrew ★★★★★ Sep 8, 2026

The one-pound bag gave us plenty of rocks to keep the tumbler going for weeks, and my daughter was thrilled to spot the tiger’s eye and rose quartz mixed in. The variety meant we could sort them by color before starting, which made the whole project feel more like a science experiment. Just wish the