What are the birthstones for each month?

You can find the different birthstones here:
January - Garnet, Tsavorite, Rose Quartz
February - Amethyst
March - Aquamarine, Sphene and Bloodstone
April - Diamond
May - Emerald, Chrysoprase
June -Pearl, Alexandrite and Moonstone
July - Ruby
August - Peridot & Spinel
September - Sapphire, Lapis Lazuli
October - Opal and Tourmaline
November - Citrine, Topaz and Morganite
December - Turquoise and Tanzanite