Thames & Kosmos Rock Tumbler ** PRE-ORDER November **

*** PRE-ORDER for November 2026 Shipping - please note we do not split ship orders that contain Pre-orders or Special orders, the complete order will be sent once all items are available.

By placing a Pre-order you acknowledge that timing can change, and delays may occur. We will communicate any known delays to you however cannot guarantee the expected delivery, this is based on information initially provided to us.

Reminder: orders over $120 receive free standard shipping

Ages 8+

Turn rough stones into beautifully polished treasures while discovering the fascinating world of geology with the Thames & Kosmos Rock Tumbler. Designed for curious kids and budding rock collectors, this hands on science kit transforms genuine gemstones into smooth, polished keepsakes while teaching the science behind rocks, minerals and Earth's natural processes.

Built with the renowned quality and innovation Thames & Kosmos is known for, this durable rock tumbler features a powerful motor, a generous 450g tumbling barrel and an adjustable timer that can run for up to seven days. Once you've polished the included gemstones, the fun doesn't stop. Continue experimenting with your own collected rocks, glass, wood and other suitable materials for endless STEM learning and creative discovery.

The included educational manual and poster guide children through every stage of the tumbling process while introducing fascinating facts about geology, rock formation and mineral identification.

Why You'll Love It

• Powerful and durable motor is built for years of rock polishing adventures
• Includes genuine gemstones including amethyst, aventurine and rose quartz to get started straight away
• Adjustable timer allows tumbling cycles of up to seven days for effortless operation
• Leak resistant barrel helps reduce operating noise while keeping polishing contained
• USB C powered for convenient use around the home
• Generous 450 g barrel capacity allows plenty of room for tumbling experiments
• Create wearable keepsakes using the included jewellery findings
• Encourages STEM learning through hands on exploration and real scientific processes
• Detailed instruction manual and educational poster make learning engaging and easy to follow
• High quality Thames & Kosmos craftsmanship delivers a reliable science kit designed to be used again and again

Perfect For

• Recommended for children aged 8 years and over
• Perfect for budding geologists, rock collectors and science enthusiasts
• Ideal for school aged children who enjoy hands on STEM activities and scientific discovery
• A thoughtful birthday or Christmas gift for curious kids who love nature, gemstones and experiments
• Great for homeschool learning, classroom science activities or weekend projects with the family

Play Ideas

• Polish the included gemstones into smooth keepsakes
• Collect rocks on family walks and polish them at home
• Create personalised jewellery using polished stones
• Compare different rock types and record how they change during tumbling
• Experiment with suitable materials such as glass or wood to discover different polishing results
• Build a growing rock and mineral collection while learning about geology

Develops Skills

• Scientific thinking
• Observation skills
• Patience and perseverance
• Fine motor skills
• Problem solving
• Critical thinking
• STEM learning
• Creativity
• Cause and effect understanding

Included

• Rock tumbler with leak resistant barrel
• 10x Different types rough rocks (200g) 
  • Obsidian
  • Citrine
  • Carnelian Agate
  • Tiger's Eye
  • Pink Calcite
  • Yellow Aventurine
  • Lemon Agate
  • Rose Quartz
  • Aventurine
  • Smoky Quartz
• 4x Packets of Polishing Grit
• Strainer for separating the stones after tumbling.
• Jewellery settings:
  • Necklace
    
  • Keychain
    
  • Ring
    
  • Earrings
• Educational instruction manual
• Educational poster
• USB C cable (USB power adapter not included).
  

You will also need (not included):

• USB power adapter (DC 5V)
• Large tray
• Water

Note:

• The rocks are natural materials.
• Colours, shapes and sizes will vary.

Approximate Size: 23 x 25 x 19cm