An unusually fine, complete and rather well-formed sixling crystal of Russian Alexandrite (Chrysoberyl). The Chromian green color is quite evident under daylight. This is classic in its form and locality, ex Eric Asselborne collection. In person this has excellent color change and with a strong light is translucent. An LED flashlight behind this shows a bright red core with a green exterior rind. Without such lighting the color is dark green and looks opaque. Most of the thin edges of this piece are sharp and well-defined though some are rough, this is far better than most specimens that have many larger edge chips or incomplete faces. A choice, classic thumbnail.
From the classic, type locality this is a cluster of Alexandrite crystals with excellent color change from green to red. This is nearly all Chrysoberyl with just a minor Mica and Quartz matrix. The crystals all show twinning and the largest is a sixling twin. From the collection of Charles M Noll, the edges of all crystals are translucent and in person the color is quite vibrant. It is quite hard to find any Alexandrite from the Urals and especially from the type locality. This is certainly a fine example.