@luma.crystal5: The pattern in a septarian nodule comes from mineral-filled cracks inside a concretion. On a cut specimen, check the polished face, natural rind, dimensions, weight, and any repairs or resin fill. Honey-colored veins are often calcite, but the seller should identify the material instead of relying on a trade name. #septarian #mineralcollecting #rockhounding #calcite #geology

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Monday 21 September 2026 02:47:26 GMT