Tall purple/violet geodes are usually called amethyst cathedrals. An amethyst geode is a hollow rock with amethyst crystals lining the inner walls, so first the cavity must be formed. This can happen anywhere there is or was lava close to the earth’s surface. Geodes are usually formed in ‘bubbles’ and other cavities in volcanic rock, especially molten rock that has intruded into other pre-existing rock layers.
Description: height: 1.56cm / width: 45cm / depth: 67cm
This is a Photographic Gallery of Museum high quality Fine Mineral Specimens and Geodes.
It’s a Unique Collection of worldwide specimens and it’s now being offered to collectors of all levels, from beginners to connoisseurs.