Amethyst - Cathedral Geode - Statement Specimen Mars sample Approximate Weight for 1 piece:
Baker’s notes & crumb story
Description
Amethyst Cathedral Geode Statement Specimen Mars sample Approximate Weight for 1 piece: Approximate Weight for 1 piece: 55g is a barium–manganese oxide [BaMn₇O₁₆] that commonly forms in botryoidal or fibrous masses within manganese rich deposits