December birthstones: Turquoise, Blue Zircon, Tanzanite
Zodiac sign: Capricorn
Anniversary stone: 11th anniversary (turquoise)
Anniversary stone: 24th anniversary (tanzanite)
Month flower: Holly
Hindu month gem: Topaz
Meaning of dreaming with turquoise: "Prosperity"
For more information about the history of birthstones, try The Curious Lore of Precious Stones by George Frederick Kunz, a fascinating compendium of all the powers that have been associated with gemstones through the ages.