Amazon.com Product Description
January's birthstone shows off its sophisticated reddish-brown color in these simple, well-made earrings. Faceted 6mm rounds of radiant garnet are mounted in light-enhancing four-prong basket settings of 14 karat yellow gold. Finished with 14 karat posts and friction backings, these pretty studs are as durable as they are beautiful. They make a perfect gift for someone with a January birthday, or for anyone who loves the richness and versatility of garnet.
About Birthstone Jewelry

January Birthstone: Garnet
Garnets come in a variety of colors but are best known for their deep red shade. January's birthstone is associated with faithfulness, sincerity, truth, and grace, and those born in this month are said to be loyal, devoted friends.
History of Birthstones
Chances are you can name your birthstone, but have you ever wondered how certain stones came to be associated with particular months? Most gem scholars trace the tradition to the Old Testament story of Aaron, whose breastplate was decorated with twelve precious stones, one for each of the twelve tribes of Israel. Over time, these stones were linked with certain powers and tied to particular astrological signs, and later to calendar months.
There are many variations of birthstone lists, including Mystical birthstones, which originate from Tibet and date back over a thousand years, and Ayurvedic birthstones, associated with ancient Indian medicine and beliefs. Birthstones have also been tied to ancient Pagan religions, and even to the collective wisdom of the legendary lost city of Atlantis.
The Modern birthstone list, perhaps the most universally known, was released by the American National Association of Jewelers and officially adopted in 1912. Whether you embrace birthstone lore, or look upon it with a skeptical eye, there is an undeniable appeal to collecting a beautiful gemstone that is reputed to hold special power, meaning, and good fortune just for you.