Color Change Garnet is one of the most rare, interesting, and phenomenal of all gems and the only example of blue garnet. In the past, gemological literature referred to garnet as occurring in every color but blue, but this is clearly not the case anymore and some Madagascan and Tanzanian color change garnets are indeed blue under the right light conditions.
Indian Alexandrite under sunlight. , Superior brilliance, and excellent clarity and although the color change is not strong, alexandrites from Andrapradesh are well known for their beautiful daylight color. More @ www.multicolour.com and #gemstones #alexandrite