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Amethyst Chemistry

Amethyst Chemistrythe color of Amethyst was believed to be due to the manganese that is found in the gemstone. Today, this reasoning is often debated among professionals, however. Although some still believe that this may be why the color of Amethyst is purple, most disagree.
Many gemologists feel that the manganese does not account for the color since Amethyst can be changed in color according to temperature. When the crystal is exposed to hot temperatures, it turns to a shade of yellow. This is how the gemstone Citrine is formed. This heated stage of yellow Amethyst also has other names aside from Citrine, such as yellow quartz.
Professionals feel that if manganese is what accounted for the color of Amethyst, the color would not be modifiable. For this reason, ferric iron impurities, as well as iron and aluminum, are now believed to be responsible for the color of Amethyst.
Lab-created, or manmade, Amethyst is made to resemble very high quality natural  Amethyst. It is very hard for anyone to tell the difference between lab-created and manmade varieties of the crystal. In fact, even professionals have a very hard time being able to tell the difference. The only way to know for sure whether or not Amethyst is natural or lab-created is gemological testing, which tends to be a very expensive option.

Amethyst is a very beautiful form of quartz. Its chemistry is also very interesting. Not only can the crystal be purple, but it is also possible for it to be modified to a shade of yellow. In this form, it is usually referred to as Citrine, which is another very beautiful gemstone.

You can find more information in our Amethyst Color information page.