Natural Citrine, which is a pale yellow color, is not common. It is sometimes marketed as Lemon Quartz. Most of the Citrine on the market today is heat treated Amethyst or Smokey Quartz. The color can be changed by heating to a relatively low temperature-around 750 degrees Farenheit and the darker colors can be achieved by heating to around 1700 degrees Farenheit. Almost all heat treated Citrine has a reddish tint to it.
Brazil is the main source of Citrine, with other deposits being found in Argentina, Madagascar, Zaire, Namibia, Spain and Russia. On the Moh scale, it has a hardness of 7. Flawless stones of many carats are not uncommon with the gemstone.
Citrine is most often confused with orange-yellow topaz which is very similar in color. Topaz is the more valuable stone and sometimes, unscrupulous dealers will pass Citrine off as topaz. Some of the more common trade names for these gems are "Madeira Topaz", "Gold Topaz" and "Bahia Topaz".
Citrine's sunny color has given it the reputation of being a gemstone that radiates positive energy and one that dissipates negative energy. It is also known as the "success stone" because it is believed to promote success, prosperity and abundance, especially in business. It is also believed that Citrine will relieve depression, self doubt and anger and can reduce self destructive tendencies. It is also believed that Citrine can aid in sleep disturbances, digestive and thyroid problems, and strengthen the immune system. Citrine is also believed to be valuable in healing the spiritual self and to enhance the enjoyment one gets from life.