Citrine is a bright yellow-orange color and is the official birthstone of November. It is also used for the 13th wedding anniversary.
Citrine is actually very rare in nature. Most of the Citrine in the market is heat treated Amethyst which changes from purple to yellow-orange when exposed to the proper heat. Today, because of the availability and affordability, Citrine is the most recognized and popular yellow gemstones used for jewelry. Ametrine is a combination of Amethyst and Citrine in color.
As true with most forms of quarts, Citrine was thought to have mystical powers and was often used to ward off evil or to protect against poisoning, especially snake venom. Since natural Citrine is so rare, there are not very many stories, myths or legends about Citrine.
Mineral Group: Macrocrystalline Quartz
Refractive Index: 1.544 to 1.553
Specific Gravity: 2.66 (+0.03/-0.02)
Mohs Hardness: 7