Brazil Very fine druzy amethyst crystals sparkle within a massive geode which displays an interesting shape and desirable open configuration. One portion of the interior exhibits an area where the crystals sloughed off and then re-formed during the life of the geode. Geodes are formed in voids within primordial lava rock. Over eons, mineral-laden water seeps through cracks, slowly producing spectacular mineral displays such as the present example. Measures 40 x 50 x 18in
Brazil Very fine druzy amethyst crystals sparkle within a massive geode which displays an interesting shape and desirable open configuration. One portion of the interior exhibits an area where the crystals sloughed off and then re-formed during the life of the geode. Geodes are formed in voids within primordial lava rock. Over eons, mineral-laden water seeps through cracks, slowly producing spectacular mineral displays such as the present example. Measures 40 x 50 x 18in
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.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
