Open Agate Geode from Brazil (3Kg)
PUMI2524
This Brazilian curiosity is absolutely natural: an air pocket in the middle of volcanic lava (basalt) was successively filled with water loaded with silicates and oxides, according to the rains and infiltrations. This gave birth to this blue and white agate all around the heart. With the heat and a long time, quartz crystals grew up, completely covering the walls of this geode. This stone has received no natural radiation, so the crystals inside have not turned into amethyst. This unique geode dates back several million years.
