The exceptionally rare alexandrite in this ring changes color depending on the light. Displaying a deep green hue when viewed in daylight, this 10.44-carat alexandrite changes to an equally stunning orangy-brown when viewed in incandescent light. The stone has been certified by the American Gemological Laboratories (AGL) as a natural alexandrite, meaning it has undergone no treatment or enhancements to achieve its unique color change. Accented by white diamonds totaling 1.05 carats, the rare stone is mounted in a platinum and 18K yellow gold setting.