Here are the modern and traditional birthstones, and in some cases their commonly recognized substitutes
January Birthstone
Garnet or Rose Quartz
February Birthstone
Amethyst or Onyx
March Birthstone
Aquamarine or Bloodstone
April Birthstone
Diamond or Rock Crystal (Quartz)
May Birthstone
Emerald or Chrysoprase
June Birthstone
Alexandrite, Moonstone or Pearl
July Birthstone
Ruby or Carnelion
August Birthstone
Peridot or Sardonyx
September Birthstone
Sapphire or Lapis
October Birthstone
Opal or Tourmaline
November Birthstone
Topaz or Citrine
December Birthstone
Tanzanite, Zircon or Turquoise