birthstone
n.
gemstone which is associated with a particular month of the year
Birthstone
Birthstones have their roots in ancient astrology, and there have been many birthstone lists used over the years. The most common one today is based on a list first publicized by the U.S. jewelry industry in the 1950s. This list assign birthstones as follows: January - Garnet February - Amethyst March - Aquamarine April - Diamond May - Emerald June - Pearl or Moonstone July - Ruby August - Peridot September - Sapphire October - Opal November - Citrine or Topaz December - Turquoise or Zircon
birthstone
BIRTHSTONE
PIETRA PORTAFORTUNA