This highly aesthetic specimen from Erongo Mountains, Namibia, features a vivid neon-green hyalite opal (strongly UV-active) growing directly on fluorite crystals, which in turn rest on K-feldspar matrix. The hyalite forms a sparkling, botryoidal crust with intense glow under UV light. The underlying fluorite shows sharp terminations, good translucency and distinct purple phantom zoning inside. Black tourmaline needles pierce through the fluorite as striking inclusions, adding extra visual drama. Minor natural surface etching and inclusions enhance the piece's authentic character from this renowned locality. A compact, eye-catching cabinet specimen combining rare opal-fluorite association, vivid UV fluorescence, tourmaline inclusions and phantom zoning – perfect for collectors seeking unique Erongo material with strong colour and textural contrast.