. ALEXANDRITE .
In the daylight, alexandrite is a bluish-green or even emerald-green color; but once in lamplight, its color changes to crimson red, purple-red, or even violet-red, making it a scientifically-fascinating, spellbinding gemstone.
The name “alexandrite” comes from the Russian czar Alexandr II, who came of age on the same day that the gemstone was discovered in one of the emerald mines in Ural Mountains. Therefore, the stone was named after him.