This is a truely mind blowing Dioptase specimen! It has one of the largest single dioptase crystals we've ever seen, and it measures in at just over 5.4cm! That's HUGE! Most dioptase crystals are measured in millimeters. This one has a perfect, lustrous termination on the top. The bottom end is partially etched and has casts of where other, smaller crystals were attached. The main crystal is surrounded by many other, smaller dioptase crytals, some of which are also etched. What is hard to see in the photos is just how lustrous this specimen is! The color is a deep green which has the typical slightly bluish tint to it. This is a very special and unique dioptase specimen!