SKU: 40678384489

Rock Tumbler

Sale price$44.99 Regular price$49.99
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 16 - Aug 21

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For Your Every Summer RSVP, with Code: SUMMER15

Description

Rock TumblerLets rock and roll! Amp up your rock collection and explore the secrets of geology with the Thames & Kosmos Rock Tumbler! This custom designed, user friendly machine allows budding geologists and gem collectors to transform rough stones into beautiful polished rocks while exploring topics like erosion, weathering, and the geological rock cycle. The kit comes with an assortment of authentic rock samples to get you started including amethyst,

Let’s rock and roll! Amp up your rock collection and explore the secrets of geology with the Thames & Kosmos Rock Tumbler! This custom-designed, user-friendly machine allows budding geologists and gem collectors to transform rough stones into beautiful polished rocks while exploring topics like erosion, weathering, and the geological rock cycle.

The kit comes with an assortment of authentic rock samples to get you started — including amethyst, aventurine, rose quartz, and more — as well as four polishing grits. Use the included jewelry settings to create accessories from your specimens. The powerful, long-lasting motor is built with durability in mind: once you’ve polished the included rocks, you can continue your experiments by tumbling rocks, glass, wood, and other materials you collect on your own. The leak-proof, noise-reducing barrel and built-in timer also aid in ease of use.

       The included manual and poster guide children on their rock-polishing adventures, providing usage instructions as well as a wealth of scientific information about different types of rocks, how they are formed, and more.

  • Quality, innovative design provides a fresh alternative for a classic science device at a competitive price

  • Built-in timer includes different settings, allowing it to run for up to seven days

  • Includes jewelry fasteners to transform your rocks into accessories

  • 450g capacity (over 1 pound)

  • USB-C power supply

  • For Age 8 +
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 40678384489

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Ame
Natrona Heights, US
★★★★★ 5
Best beanie!
This was a Christmas gift and the receiver loved it! It was just what he wanted! Cashmere is always the best choice for comfort, softness, wearability and durability!
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Reviewed in the United States on January 18, 2026
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Amazon Customer
Lake Worth, US
★★★★★ 4
Great value
Good quality at a great price
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Reviewed in the United States on February 3, 2025
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Lucas Secoy
Fort Morgan, US
★★★★★ 5
Cashmere dream
Just arrived today. Very soft, light and warm. Fits comfortably without being tight. This hat is really well made and it far exceeds the price point it’s sold at.
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Reviewed in the United States on November 20, 2025
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Susan H. Chinchar
Belleville, US
★★★★★ 5
Love perfect fit..doesn't move up and super soft
Love this hat! Gift for my nephew. He has had it stolen by others since it is perfect fit and super soft.
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Reviewed in the United States on February 5, 2026
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龍気
Charlottesville, US
★★★★★ 5
Perfection in the form of a hat.
Best hat ever! It’s perfect in every way, fits right to your head like a skully cap should. It’s not too thick or thin for a chilly winter in the mountain forest, I wore it to sleep a few times, doesn’t seem to make me too hot.
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Reviewed in the United States on February 4, 2026

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