Amethyst - Cathedral Geode - Statement Specimen orthorhombic These water-worn corundum fragments were

These water-worn corundum fragments were naturally tumbled by ancient stream systems

Mindat lists quartz and albite among the most common associated minerals at these localities

parallel black bands running through multiple crystals

and high-temperature equipment

Whether used morning or night

Amethyst - Cathedral Geode - Statement Specimen orthorhombic These water-worn corundum fragments wereMined from: Rio Grande do Sul, Brazil Description: This one of a kind Amethyst cathedral geode statement specimen from Brazil features a tall, naturally formed cavity lined with dense purple Amethyst crystals. The colour ranges from pale lavender along the edges to deeper purple through the center and upper cavity. A thick border of white to clear quartz surrounds the Amethyst, followed by a narrow band of blue grey agate and the original dark basalt