Theduke said:Try some wood deck cleaner one that has oxalic acid as the active cleaner. Soak it for a few hours then it may break apart, itll clean most of the fine particles off the little eggs as well. Looks like its from a lava flow that was most likely a narrower channel that cooled quickly as the minerals didnt have time to collect in large areas before cooling. Have the same around a couple of pockets of black amethyst I found. Hope this helps
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