December Birthstone 1st of December, 2019 By Laura Kaser All of December’s birthstones are a shade of blue which is fitting for this cold, winter month. Zircon, Tanzanite and Turquoise. Tanzanite is extremely rare and can only be found in Tanzania. It is said to have calming and soothing properties the gem of prosperity, happiness, clarity and strength. Named for Tanzania, the country where it was discovered in 1967, by Tiffany & Co. It is found in only one place on earth, near majestic Kilimanjaro. It was also the first gemstone to be added to the birthstone list, in 1912.