An Art Deco alexandrite and diamond engagement ring, the central cushion-cut alexandrite of 5.73 cts, mounted in platinum with each shoulder set with a triangular, trapezoidal, and hexagonal diamonds. Signed JEC & Co. for J.E. Caldwell, #L7287. AGL report certifying alexandrite to be from Ceylon with no enhancement. Atw diamonds 0.50 ct.

"Emerald by day, ruby by night" is the classic description of the color change phenomenon exhibited by this gemstone when observed under different light sources.
First discovered in the Ural Mountains in Russia in 1830 and named after the heir to the throne Alexander II, this gem endeared itself to the Russian people as it represented the military colors of Imperial Russia.
Very rare and very dramatic, alexandrite sets the standard for all color change gemstones and has, in fact, lent its name to the color change phenomenon itself: the alexandrite effect.

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