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The iron oxidizes into reddish bands while the reduced iron creates green or whitish banding
Black onyx from Mexico
Measuring approximately 4 inches in height
stalactites
Septarian C panda The iron oxidizes into reddishSeptarian are carbonate rich concretions containing angular cavities and cracks filled with hardened material. Mud or siltstone occupy the darker areas, while calcites occupy the voids and cracks The mudstone and calcite contain iron. This display piece has brilliant contracting colors and is polished into a freeform. Measuring 4. 7 inches in length and height, and 3 inches in width. Weighing 1. 6 pounds. Customer will receive the exact piece pictured.
