December is a month when many things are overdone. Stores are open 26 hours per day, sales offer discounts on discounts (or so they claim), foods have more calories and portions are larger, etc. With all these other excesses, I suppose it should then be no surprise that December would outdo all other months by having three official birthstones. Zircon, turquoise, and tanzanite are all recognized birthstones for the final month of the year. I guess we had better get started.