National Geographic rock tumbler refill kit: 5 lb mixed rocks vs 6 LBS Rock Tumbler Grits Kit for 4-Step Polishing
Overall winner: National Geographic rock tumbler refill kit: 5 lb mixed rocks
Key Differences
Pick Product A (National Geographic kit) if you want a mixed rock refill set with multiple rock mixes, included 20 grit packets for five tumbling cycles, clearer instructions, and a slightly higher average rating. Pick Product B (Tonmp) if your priority is a larger total grit quantity and a dedicated 4-step silicon-carbide grit set that’s labeled as compatible with all tumbler brands, though some customers report duller polish and mixed polish effectiveness
National Geographic rock tumbler refill kit: 5 lb mixed rocks
Rock tumbler refill kit with 5 pounds of unpolished rocks and gemstones, plus 20 grit packets for multiple tumbling cycles. Includes gemstone, agate, Madagascar, and jasper mixes. Users note good quality and polishing, with some concerns about rock size and durability
Pros
- includes multiple rock mixes
- 20 grit packets for five tumbling cycles
- clear instructions and easy to use
- good polishing capabilities
Cons
- rocks may be small for some users
- durability concerns with crumbled stones
6 LBS Rock Tumbler Grits Kit for 4-Step Polishing
4-step rock tumbler grit kit with 60/220/500/1200 grits and substantial quantity. Provides value for polishing multiple rocks. Some customers report mixed polish effectiveness and variable shine
Pros
- includes 4-step grit set
- large total grit quantity
- compatible with all rock tumbler brands
- value for the price
Cons
- polish effectiveness rated mixed by customers
- shine results described as dull by some
- magnet strength receives mixed reviews
Head-to-Head
| Criteria | Winner |
|---|---|
| Price | JMW Sales, Inc. |
| Durability | Tonmp |
| Versatility | JMW Sales, Inc. |
| User Reviews | JMW Sales, Inc. |