Review on Explore Nature's Gems: NATIONAL GEOGRAPHIC Rock Tumbler Refill Kit with Mookaite, Kabamba, and More - Includes 8 Jasper Varieties, 4 Grit Grades, Jewelry Fastenings, and Learning Guide by Jacob Sampino

This was part of a gift for our 10 year old daughter who was waiting to get a glass and stones. We chose the gemstone refill set because it contains 9 different gemstones. At first the bag looked like someone had walked through it. He's barely reached half the mark. Second, the stones were very small and there were many small fragments in what was left at the bottom of the bag. Finally, and most importantly, the two gems they reported weren't there. There was no jasper or agate. We know exactly what these stones must look like and so does our daughter. Too bad we got a bunch of rubbish. You could find better stones right near our house or near the lake. Don't buy unless you want a bunch of dull rocks. Shame on your National Geographic. I thought it was a high quality product. Unfortunately disappointed.