If that's what you're looking for, it's not pitch black, it's more of a dark grey. They're a decent size for nano tanks. I like these river stones because they are natural and smooth. I'm not worried about them ripping my betta fins. In total I got 7 stones. The largest is about 3 inches, the smallest about 1 inch and 3/4. It wouldn't hurt to take 2 packs.
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