Amethyst Geode.
Origin: Brazil
Height: 23 cm approx.
Weight: 25,4 kg approx.
The Brazilian Amethyst Geode is a spectacular geological formation characterised by its rocky cavity, often made of basalt, lined internally with amethyst crystals of an intense violet colour. The formation of these crystals occurs over millions of years from silica-rich hydrothermal fluids that seep into the gas bubbles of volcanic rocks.
