A gem variety of chrysoberyl that appears green in daylight and red in artificial light.
- Before nightfall, the group had seen amethyst, citrine, imperial topaz, aquamarine, tourmaline, and even alexandrite.
- Randy G. Lander is a Russian descendant and she carries on the medieval Khazars tradition of jewelry trading with an emphasis on alexandrite. She can tell you alexandrite is the rarest gemstone on earth.
- Lasers with wavelengths of 600-1100 nm (such as the ruby, alexandrite, and diode) penetrate deeply and are absorbed by eumelanin in the hair shaft and follicle, which is thought to be the target chromophore.
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