what is may's gemstone?
Mayâs birthstone, the emerald, is a type of beryl colored green by chromium. Perfect emeralds are among the rarest of gemstones. The emerald belongs to the beryl family of minerals that include aquamarine (one of Marchâs birthstones), heliodor, and morganite. Beryl, or beryllium aluminum silicate in chemical jargon, is a six-sided symmetrical crystal. Beryl contains beryllium, aluminum, silicon, and oxygen.