Alexandrite is the ultimate color-change gemstone: green under daylight, red under incandescent light. Discovered in Russia in 1830 and named after Tsar Alexander II. Rarer than diamond, it is one of the world's most sought-after gems.
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Submit a requestAlexandrite is a chrysoberyl containing chromium, which absorbs light uniquely. In daylight (blue-rich), it appears green. Under incandescent light (red-rich), it turns red or purple. This spectacular change is the most pronounced of any gemstone.
Original Russian deposits are depleted. Sri Lanka, Brazil, and Tanzania still produce specimens, but fine quality stones remain exceptionally rare. 8.5 Mohs hardness.
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