A symbol of prosperity, longevity, and spiritual growth, Alexandrite is a rare variety of mineral chrysoberyl. This alluring gem is also known as the color change-gem — “Emerald by day, ruby by night.” Some of the finest color alexandrites come from Russia, although today, those historical mines produce very little. Alexandrite is found in Sri Lanka and Zimbabwe .Because of its scarcity especially in larger sizes, alexandrite is one of the more valuable colored gemstones.