Chrome Diopside is a gem found in Siberia - and is commonly known as the Russian Emerald.
Mining Chrome Diopside can be very tough to do. In sub-zero temperatures, a man's strength is diminished greatly. Too much exposure can result in hypothermia and death. Miners take every precaution and can not mine during the bone-crushing winter months.
This beautiful green gem has higher refraction than an emerald.