Answer:
Birthstone is a particular gemstone that represents each month. January is Garnet, February is Amethyst, March is Aquamarine, April is diamond, May is emerald, June is Pearl or Moonstone, July is Ruby, August is Peridot, September is Sapphire, October is Opal, November is Topaz or Citrine, December is Turquoise or Zircon.