If you love jewelry, December is a fantastic month to have a birthday because you can wear four different stones for your month: turquoise, topaz, tanzanite, and zircon. Each stone has its own meaning, but what they all have in common is that each stone is a beautiful shade of blue. The stunning blues match with the cold month because blues are associated with ice. It is also considered a cool color in the color wheel. Topaz and zircon stones can be found in several other colors, but blue is the color used for December birthstones.