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A great starter set for anyone looking to explore and learn more about geology. Perfect for classrooms - provides an excellent, hands on teaching aid for individual and group learning.
Single product Rock: 0.5"-1"(1.3~2.5cm)Service Guarantee:
If You have any questions about Rock,please feel free to contact us. We will always be there and do our best to satisfy you.
PtarC
Reviewed in the United States on September 19, 2024
Topaz stone was smaller than what was shown on Amazon but everything else was ok. I test scratch the stones to each other and then to glass as well as to other sapphires and a diamond. Seems to check out. The diamond passed a simple diamond tester as well but it doesn't look like any natural uncut stone that I've seen. I'm still new to all this but its a fun kit to test other stones.
Mike C.
Reviewed in the United States on March 19, 2024
I purchased this hoping to use it to test the hardness of rocks before I polished them. The three hardest rated stones in the kit wouldn’t scratch a petosky stone, which ranges between 4 or 5 on the Mohs scale.
Liz C.
Reviewed in the United States on December 14, 2024
This kit has been super-helpful. I just used it to test the stones on a bracelet. And I've used it lots of times to help determine what rocks I've got, so I can make sure to tumble them with rocks of similar hardness.
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