We recently had another street purchase that yielded yet another ugly but interesting rock.
It was not very appealing and I told the person I wasn't interested. He asked if I knew what it was and I told him it was a leverite. He then asked me what a leverite is. My response; le-ver-ite there and smiled. He asked if I would give anything for it. I said no and he promptly left. He's a regular that comes in at least once a week to sell rocks he finds. Occasionally he brings in something worth buying. He came back a few days later with the same rock along with some others. This time he had several nice pieces with it. So we haggled and I bought the lot. This piece is about the size of a golf ball and from the naked eye, and looks like a piece of dinosaur bone. Of course I had to check it out under the scope. What a difference.
Instead of seeing pits like I expected, there are broken nodules and extrusions which look like little cave formations.
So the next time you are tempted to dismiss an ugly rock, take a closer look.
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From @roswellrockman