Tanzanite occurs in a range of blue and violet colors, as well as a combination of the two. It is one of the newest gems to enter the colored stone world. In addition to being one of the birthstones for December, tanzanite is also given for a 24th wedding anniversary. As for Zircon it is found in a wide range of colors—red, orange, yellow, reddish-brown, green, and blue. Colorless zircon, known for its brilliance and flashes of multi-colored light, has been confused with the diamond for centuries. Lastly, Turquoise occurs in a range of colors: from various shades of green to greenish-yellow to the more recognizable robin egg blue and sky blue. The gem is semi-translucent to opaque and can be found with veins or spider webs, which occur due to the presence of host. The veins can appear as brown or black. The gem has long been thought to possess the powers to ensure good health and good fortune. Others believed it could promote happiness, peace, positive energy, protection, and spirituality.