This is an unusually aesthetic and superb toenail spray of rare, robust Atacamite crystals from the Moonta mines in Australia that probably dates to the early 1900s. It's a small, but impactful piece comprised of deep emerald green, translucent (transparent with intense backlighting), divergent, prismatic crystals with most having excellent terminations (a few are incomplete). The Atacamite crystals are lustrous, well-formed and exhibit perceptible bright green internal reflections. This material is a historic classic and is EXTREMELY DIFFICULT to come by today as most were mined prior to 1930 or so. To get such fine crystals is hard enough, but nearly pristine ones in a 3-dimensional spray are nearly impossible to obtain. Old material, superb for the species, and seldom seen.