Alexandrites are a rare variety of gemstones, noted to be even rarer than the diamond. A gemstone that can change from day to night, it is truly a mineral wonder. At 2.57 this oval shaped alexandrite is a gemstone that is priceless. An eye clean gem, filled with a soothing color, it transforms from a cool khaki green to a warmer purple. With a good hardness, this gemstone seems fit for an engagement ring, as it can take a lot of wear and tear on a daily basis. The perfect statement piece, this gemstone will easily take you from chic, to glamorous within seconds.