Black Amethyst - Specimen congo mineral specimen this Harpes trilobite carries a

this Harpes trilobite carries a strong prehistoric presence and serves as a striking reminder of ancient marine life preserved through natural geological processes

where large feldspar crystals formed first

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

It is also a relatively hard mineral

Black Amethyst - Specimen congo mineral specimen this Harpes trilobite carries aMined 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