13hhjjis ((GYROLITE GEODE)), $10 MINIMUM BID, Poona, Maharashtra, India, 10 x 9 x 6 cm, Cabinet, | |
Like the Amethyst cathedrals in Brazil, these are also not true geode but cavities, gas bubbles in Basalt that fill with crystals. Then the outside are chipped away around the cavities forming a geode like shape. |