Black Obsidian Polished Nodule 1.85 kg — Collector Specimen Volcanic Glass Display Piece Cabinet Size

This substantial black obsidian nodule weighs 1.85 kg (approximately 1.8 lbs) and presents mirror-quality polish across a complex, lobed surface morphology. Deep black volcanic glass is interrupted by striking golden-brown translucent flow-banding zones that catch light from within, revealing the stone's true character as a geological record of rapid magma cooling.

Obsidian forms when silica-rich lava solidifies so quickly that no crystalline structure develops — the result is a naturally amorphous volcanic glass. The conchoidal fracture surfaces visible on this specimen are the same feature that made obsidian a prized tool-making material for thousands of years. Locality evidence points to Mexico or Central America, regions historically associated with high-quality black obsidian with pronounced banding.

At cabinet size and high-grade display quality, this nodule is suited for a mineral collection, a natural history shelf, or as reference material for a working lapidary studio. The contrast between jet-black body color and amber translucent zones is exceptional for a specimen graded common — the size and surface complexity elevate it well above typical obsidian on the market.

Weight: 1.85 kg (4.08 lbs). One specimen available. Sold as shown.