birthstones

From Wikipedia,

Month	Modern Birthstone[2]	Alternate	Traditional Birthstone[3]
January	Garnet	Rose Quartz	Garnet
February	Amethyst	Onyx	Amethyst
March	Aquamarine	Red Jasper (Bloodstone)	Bloodstone, Jasper
April	Diamond	Rock Crystal (Quartz)	Diamond, Sapphire
May	Emerald	Chrysoprase	Emerald, Agate
June	Pearl (the only non-mineral), Moonstone	Alexandrite	Alexandrite, Emerald
July	Ruby	Jade or Carnelian	Ruby, Onyx
August	Peridot	Aventurine, Sardonyx, or Sapphire	Sardonyx, Carnelian
September	Sapphire	Lapis lazuli	Sapphire, Peridot
October	Opal	Pink Tourmaline	Tourmaline, Aquamarine
November	Yellow Topaz	Citrine or Turquoise	Citrine, Topaz
December	Turquoise, Blue Topaz	Lapis Lazuli or Tanzanite	Zircon, Ruby