Obsidian Rock Specimen - Natural Volcanic Glass with Flow Banding #3334739 (License: Personal Use)

This high-quality obsidian specimen displays prominent concentric flow banding-a result of differential cooling and movement in viscous rhyolitic lava. Its jet-black, lustrous surface reflects light like glass, confirming its natural volcanic glass composition with minimal crystallization. The irregular, broken edges suggest it was hand-collected from a fresh outcrop.

Used on educational geology websites, museum digital collections, or mineral retail pages; serves users seeking to identify obsidian, understand volcanic textures, or source specimens for study or display.