Is There a Garden Variety of Basalt?

There's a kind of rock alled basalt. If you see a fine grained, sometimes really smooth rock, that's probably basalt. There are naturally occurring rocks that have a hole straight through em and those are called hag rocks. A lot of rock color is going to be based on it's chemistry. And the reason in a rock it looks like dark colored or gray is because there's no light in there. But i just wanted to put a few driveway rocks on a string. It was a hard time.

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