A colorful polished azurite hemisphere from Poteryaevskoe Mine, Rubtsovskoe Cu-Zn-Pb deposit, Russia. It is a half ball with an amazing royal blue color - very vivid and rich. Featuring azurite aggregates with a different color intensity. At the center are seen irregular formations. For references see the issue of The Mineralogical Record vol. 45, # 4, July-August 2014. In superb condition. Polished.
Striking blue!