![Amethyst - Cathedral Geode - Statement Specimen Mars sample is a barium–manganese oxide [BaMn₇O₁₆]](https://cdn.shopify.com/s/files/1/0601/7158/3658/files/AmethystCathedral-Mineral_2000_-2.jpg?v=1785271710)
Amethyst - Cathedral Geode - Statement Specimen Mars sample is a barium–manganese oxide [BaMn₇O₁₆]
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Amethyst Cathedral Geode Statement Specimen Mars sample is a barium–manganese oxide [BaMn₇O₁₆] is a barium–manganese oxide [BaMn₇O₁₆] that commonly forms in botryoidal or fibrous masses within manganese rich deposits shallow bowl shape with a polished interior and a natural