51.31ct Amazing Unheated Tanzanite Crystal with Spectacular TerminationThis gorgeous Tanzanite Crystal displays a magnificent deep blue and violet hue complemented by its splendid termination. At the base lies a translucent gemmy window, which exhibits a grayish color. When exposed to a polarized light source, such as a computer screen, the window's color shifts to a vivid yellow orange. Audiences will be awed by this mineral's exceptional beauty watch the video to get a full 360 view. Mined from the Merelani Hills,