Zircon is the substitute stone of diamond and comes in several colors and shades. Depending on the impurities found in the stone it is also found in a variety of colors like the blue, green, red, yellow, brown, violet, aquamarine, orange or colorless. Zircon is associated with the Zodiac signs of Aries, Capricorn and Sagittarius. It is also the birthstone of those born in the month of December. This stone is said to bring in success, wealth and fame to the wearer.