The Denver Museum of Nature and Science recently invited me (and a couple of other guys too) to identify the gems in the sculptures of Vasily Konovalenko. The museum is home to the largest collection of gem carvings outside of Moscow by the Russian expatriate. It is the only public collection and display in the Americas.
Each of these intricately detailed carvings capture scenes from Russian folklife and are designed from a huge palette of colors using only gems! If you haven't had the opportunity to see them you should visit the museum and take a look at the 16 sculptures that are on display there.