Does this mean these is something inside this boulder? Boulder is probably 200 pounds.
🔎 UNIDENTIFIED What is this black crystalized line around this boulder?
- Thread starter Alienboss
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Bucket Lister
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"something inside"... ?
More likely it means that the "boulder" was cracked or split at one time, and ground water with dissolved minerals seeped in and crystalized/solidified over time. IME, that thin vein goes all the way through at the same thickness.
I doubt it's a geode.
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ConceptualizedNetherlandr
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Bust off a fresh surface and see what the vein material is made of. Mineralization?
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tamrock
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It's some kind of mineralization that formed in a cracked rock formation long before it became a boulder. My wild guess it be manganese in the crack. No one can ever say for sure with only a picture.
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