December Birthstones  Ancient Artifacts & Treasures, Inc. Turquoise and Lapis Lazuli December has two birthstones: Turquoise and Lapis Lazuli. Turquoise is the traditional birthstone, but in recent times many of the birthstones have had a second or third birthstone added due to the increasing cost of many birthstones. Turquoise: Turquoise is perhaps the oldest stone in man’s …