Natural Alexandrite Gemstones Alexandrite is especially remarkable for its strongly marked difference of color, depending on whether it is viewed in natural or artificial light. The finest stones present a bright green, or deep olive green color, by daylight; whereas, at night, artificial light brings out a soft columbine red or raspberry tint, or purple. It has been said that the Alexandrite is an emerald by day and an amethyst at night. Shop for fascinating and beautiful natural Alexandrite gemstones on eBay and you'll find some great prices. [nmspage:gems,siteId=0] [nms:Natural Alexandrite,97,0,1,Natural Alexandrite,siteId=0|sacat=10190] [nmspage:gems,siteId=0]