These colorful Beanie Babies were made to celebrate birthdays. The colors represent the colors associated with the gem stones for that month. Traditional Birthstone are: January - Garnet, February - Amethyst, Hyacinth, Pearl, March - Bloodstone, Jasper, April - Diamond, Sapphire, May - Emerald, Agate, June - Cat's Eye, Turquoise, Agate, July - Turquoise, Onyx, August - Sardonyx, Carnelian, Moonstone, Topaz, September - Chrysolite, October Opal, Aquamarine, November - Topaz, Pearl and December - Bloodstone, Ruby. The Modern Birthstones are: January - Garnet, February - Amethyst, March - Aquamarine, April - Diamond, May - Emerald, June - Moonstone, Pearl, July - Ruby, August - Peridot, September - Sapphire, October Opal, Pink Tourmaline, November - Topaz, Topaz, Citrine and December - Turquoise, Zircon, Tanzanite, Blue Topaz. It is possible that naming gem stones for various months had its history in the 12 tribes of Israel, when God required that they use a gem stone to represent each tribe. In the Book of Revelation, the new Jerusalem has a wall with 12 foundations garnished with precious gems, which were jasper for the first, sapphire for the second, chalcedony the third, emerald the fourth, sardonyx the fifth, sardius the sixth, chrysolyte the seventh, beryl the eighth, topax the ninth, chrysoprasus the tenth, jacinth the eleventh and amethyst the twelfth.