Russian Alexandrite

In 1831 Izumrudnye Kopi (Emerald mines) on the river Tokovaya were open by Yakov Kokovin, Director of the Ekaterinburg Lapidary Works and in 1833 the first alexandrite in the world was found in the mica schists of the Tokovaya river. In 1840 the largest alexandrite crystal cluster to date was found. Between 1840 and 1900, Izumrudnye Kopi was the primary source for alexandrite.