Review (4/5): Might be worth the money, but the stones are a different size for some reason
I actually bought these because I got my first Syrian Hamster, and needed a way to trim his nails. I placed these underneath his water bottles in hopes that it'll do some good. I poured very hot water over them to sterilize, then let it air dry on a towel for at least a full day.
I decided to pick this particular one because it was a "two pack" and I'll probably use the second one for myself (I bought another "buy one get one" pumice stone at the same time to compare)
The...bubbling? Isn't even all around. One area has deep pockets while another has several tiny bubbles. I don't know what that says about the product or seller, but it'll be interesting to try out I suppose.
Also, they're two completely differently sized pieces. One is definitely thicker than the other.