Alexandrite is the new member of the chrysoberyl family and it is basically a translucent gem of bright green color that shines deeply red-violet in artificial light
Rated 8.5 on the Moh scale, this is a hardy, durable stone that is almost impervious to regular wear and tear. Named for Alexander II, it is hugely popular in Russia , where it was claimed to be discovered in 1831, though it has caught on in the rest of the world now and sells frequently. It is an inexpensive stone and easily obtainable in point-weight sizes, though the rare, full-carat weights can draw an astonishing price. Prices for a guaranteed natural stone that noticeably changes color from green to red can start at around $1500 per carat weight for a fine-grade gem and it can reach up to $15,000-$20,000 per carat weight for higher quality and clarity gems. Anything lighter than a full carat weight of stone should make for a fine piece of jewelry. Point-weights are usually a good buy, as they are not worth simulating and they don't cost very much. Natural alexandrite is very hard to find in jewelry store today, as they hardly circulate in the market these days and are routinely simulated in good synthetic imitations that are hard for the average consumer to spot. Anything heavier than a point weight is suspect as fraudulent and should be considered with care.