Alexandrites are one of the most sought after and rare collector’s gems. Alexandrites are known for their “metamerism” - a unique color changing effect when exposed to different lights. This precious gemstone is named after Zar Alexander II, who was the first collector to research the stone. This gem is the most precious variety of Chrysoberyl. Displayed here is the ultimate collector's piece. This Alexandrite displays distinct color change. For the size and tremendous clarity of the stone, this gemstone is exceptional.