Hyalite opal is a rare, glassy variety of opal prized by collectors for its striking fluorescence under ultraviolet light. This specimen from the Erongo Mountains of Namibia displays the characteristic transparent to translucent appearance and vivid UV glow that makes hyalite highly sought after. At 8.5 x 1.5 x 6 cm, this is a substantial display piece suitable for serious mineral collections. Hyalite forms in volcanic and hydrothermal environments and is valued both for its optical properties and geological significance. A premium addition to any mineral collection.
