Maddabling just happens to have a Birthday in December. I thought I would do a little research into December Birthstones. Here is what I found.
"If you were born in December, you are lucky to have a choice of three gems on the modern birthstone list: blue topaz, turquoise and tanzanite. Blue is the color for December, and the traditional birthstone list also includes zircon and lapis lazuli."
information from: http://www.gemselect.com/other-info/december-birthstones.php
I hope you love the pretty blue December Birth Stone collection I have put together x