Rare chalcedony formation inside the vug instead of amethyst. Cathedral with wooden base F-003 : 9.8'' x 6.7'' x 3.9''
Geodes are essentially rock cavities. The interior contains pure quartz crystals and/or chalcedony deposits, and others have rich purple amethyst crystals, or agate, jasper or minerals such as calcite, dolomite, celestite, etc. |
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