Black Amethyst - Specimen congo mineral specimen Obsidian forms when silica-rich lava

Obsidian forms when silica-rich lava cools so quickly that atoms do not have time to organize into crystals

Open pockets and exposed matrix areas add depth and contrast

quartz fills remaining pockets as silica-rich fluids continue moving through the rock

Age: Lower Devonian

Helps heal problems with the reproductive system and regulates metabolic functions

Black Amethyst - Specimen congo mineral specimen Obsidian forms when silica-rich lavaMined from: Rio Grande do Sul, Brazil Description: This one of a kind Black Amethyst specimen from Brazil features a bold, upright geode section with a dramatic natural silhouette and a richly textured crystal face. The surface is covered in dense, sparkling micro crystals ranging from deep black purple to smoky lavender gray, with lighter quartz edging and patches of rugged brown gray matrix visible along the sides and back. Its tall sculptural