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You’ll need at least some level of uniform crystalline matrix to get that smooth of a rounding via erosion. Gotta be at least intrusive igneous or metamorphic.
If a guy won’t tell you it’s because he’s igneous.
You’ll need at least some level of uniform crystalline matrix to get that smooth of a rounding via erosion. Gotta be at least intrusive igneous or metamorphic.
If a guy won’t tell you it’s because he’s igneous.