The January birth stone is the garnet, as seen in these garnet birth stone eternity rings. They have been quite popular for thousands of years, and our collection of January birth stones eternity bands keeps this tradition alive beautifully. January birthstone color is a gleaming gem of deep red that burn brightly in the dark of winter's coldest month. Wearing garnet birthstones in jewelry like this eternity band was once believed to increase the wearer's success and strength.