Alexandrite gemstones
It can be almost emerald-colored, but is more often yellowish or brownish green. Its main characteristic is the ability to change color if exposed to a light source rich in red rays; by candlelight or tungsten light, it turns red or reddish. This unusual phenomenon is what distinguishes it from other green Chrysoberyl. This pronounced color change from green to red is highly prized and, as always, the exact tone of the color, or colors, is important, the ideal being brilliant green turning to fiery red although dull green turning reddish or slightly turbid blood red is more common. Given alexandrite's extreme rarity, even stones with the number of inclusions are cut. It is given an oval or round, mixed cut, or a rectangular, step cut.
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