Alexandrite is a pearlescent green gemstone whose colour changes with the light. Green in sunlight, it appears red under incandescent light. Gemologists use its appearance in natural sunlight as the baseline when judging the strength of the change.
Alexandrite is a pearlescent green gemstone whose colour changes with the light. Green in sunlight, it appears red under incandescent light. Gemologists use its appearance in natural sunlight as the baseline when judging the strength of the change.