I just love the coloration on this miniature. The gradation through the iridescent rainbow captures the essence of this discovery. The couple of contacts provide windows to the matte traditionally colored Chalcopyrite below the sparkling outer layer, and the contrast is striking. This piece has a little hat of dark matte luster in combination with a pair of contacts, making it look like little person! Read up on the scientific analysis of these at https://bit.ly/2MPR6Fi