https://flic.kr/p/d9hh9L | Tumbled Pebbles - AFTER | So this is what the pebbles look like after tumbling them for one month. It's a four step process. Each week, you have to change the grit that the rocks are tumbling in. The first week is very course grit, which rounds them out (although these stones really didn't need to be rounded out because the Delaware River and Bay already did that). The second week, the grit is still kind of course, but less so. The third week, the grit is…
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