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🧑🔬 Elevate your science class with rocks that rock the curriculum!
This set of 12 raw gray limestone specimens, each about 1 inch in size, is hand-selected by geologists to showcase authentic sedimentary rock features. Perfect for classroom use, these calcium carbonate-rich samples demonstrate acid reactivity and support identification exercises. Individually packaged and labeled for easy handling, they bring a professional touch to geology education.
| Customer Reviews | 3.7 out of 5 stars 73 Reviews |
M**Z
Not what I expected
Rather costly for such simple small raw rock
N**S
Technically 'gray' but actually black
For use in the classroom my students struggled to compare basalt and this limestone because it was so dark. It was only density that helped them distinguish between the two. Pieces are about 1" each.
J**R
Look at measurements before buying
Wish I had paid attention to size….this was basically a pebble
M**.
Small but looks nice
Small but looks nice in my 10 gallon tank. Kind of expensive for the size. Baught it to try to bring up my ph in the tank. To soon to tell if it worked.
M**R
Way overpriced for Rocks... C'mon
Returned. Way overpriced for Rocks... C'mon
B**Z
As described
This product arrived early and was exactly as described.
P**.
They're rocks,
I would give it a 5 but they're very small for how much they are. I've been keeping freshwater shrimp and snails for 10 years now. Snails and shrimp NEED calcium and the best way to give that to them long term is limestone. Sadly, I live in an area where I cant easily find limestone. If you have limestone in your driveway or in your yard, I recommend rinsing that off and using that instead.
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