Very glassy and gemmy, emerald-green, somewhat rounded cuprian smithsonite crystals richly fill vuggy matrix on this MAGNIFICENT and showy Tsumeb specimen. Emerald-green Tsumeb cuprian smithsonite of this quality and rich color saturation is RARE and HIGHLY DESIRABLE, only coming available from elite collections. Formerly in the Ron Bentley Collection, first curator of the Houston Museum of Natural Sciences' mineral collection.