💎 Turn rough stones into polished gems—and your creativity into a conversation starter!
The Blue Marble NATIONAL GEOGRAPHIC Hobby Rock Tumbler Kit is a durable, all-in-one STEM science kit designed for both kids and adults to transform rough rocks into polished gemstones. Featuring adjustable time and speed controls, a leak-proof stainless steel barrel, and the patented GemFoam polishing foam, this kit offers a complete, mess-free tumbling experience. It includes one pound of rough rocks with nine gemstone types, polishing grit, jewelry fastenings, and a strainer, making it perfect for educational and creative exploration.
| ASIN | B086Z6ZB7R |
| Assembly Required | No |
| Batteries Included? | No |
| Batteries Required? | Yes |
| Best Sellers Rank | #36,107 in Kitchen ( See Top 100 in Kitchen ) #456 in Tumblers & Water Glasses |
| Color | multi |
| Customer Reviews | 4.3 4.3 out of 5 stars (3,521) |
| Date First Available | 28 August 2020 |
| Educational Objective(s) | Geology and Creative Thinking |
| Item model number | NGHOBBYTUMBLER2 |
| Language | English |
| Manufacturer recommended age | 12 months - 3 years |
| Material Type(s) | Cotton |
| Number of Game Players | 1 |
| Product Dimensions | 33.3 x 12.7 x 20.7 cm; 1.9 kg |
| Remote Control Included? | No |
| tech_spec_battery_description_toys | Not required (mains powered) |
C**L
cadeau de noel pour mes parents qui aime faire des bijoux fantaisies. il me dise que le procédé est long mais que le résultat est bon. les pierres qu'ils ont ramassé eux même on perdu 50% de leur taille.
M**N
It is incredibly loud. There is no place in my house that I can run this overnight. I live in Canada, cannot leave water in unheated shed. There is enough abrasive material for one tumbling cycle. The cycles take 3 - 6 days each. Many of the included rocks are so small, they are unusable after the 2nd or 3rd cycle. This product could be better. It does exactly as intended. My son is more knowledgable since we purchased this product.
G**H
This is a great introductory rock polisher and does an excellent job. The manual could include more tips on practical rock polishing. The supplied rock mix contains various types of rocks that in some cases should not be polished together as the softer rocks are destroyed by the harder rocks. That being said it is part of the learning experience. Please note the machine is noisy and may need a sound proof box unless you have a shed some distance from your home.
R**E
Tolles Produkt
R**N
Mi hija se li ha pasado genial puliendo piedras
Trustpilot
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