where are the Russian alexandrites?
"While alexandrite occurs in locations such as Brazil and Sri Lanka, the prized specimens are those from ancient mines in Russia's Ural Mountains, where the gem was discovered in 1834 on Czar Alexander II's 16th birthday. When miners poured out the emerald-colored crystals they had mined that day, the evening campfire light showed them as brilliant violet-red. Green and red were the colors of imperial Russia."
https://www.barrons.com/articles/SB50001424052970203511504576329081143859922