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A rare color-change alexandrite and diamond halo ring. This large, natural 1.19 carats alexandrite changes color from bluish green in daylight to grayish purple in artificial light and is GIA certified. Once only obtainable by czars and royalty, alexandrites are prized by gem connoisseurs and collectors. A brilliant cut and oval shape are accented with 0.44 carats of pave diamonds forming the halo and decorating the sides of this unique platinum ring.