An extremely rare demantoid. Such were encountered at the beginning of the development of the Karkodinsky field only in the 90s of the last century. And even then there were not many of them. Usually in the Ural demantoids bissolite and hollow channels, but in this stone we see good, large "sticks" of diopside. At present, such stones simply do not exist, although the cost of this stone is relatively small. Video shot: macro / in daylight shade / under a white lamp.
