birthstone
The use of gemstones to represent one's birth month.
Traditionally, the stones for each month are:
- January = Garnet
- February = Amethyst
- March = Aquamarine
- April = Diamond
- May = Emerald
- June = Pearl or Moonstone
- July = Ruby
- August = Peridot
- September = Sapphire
- October = Opal or Tourmaline
- November = Topaz or Citrine
- December = Turquoise or Tanzanite

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