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Citrine Quartz

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Title: Citrine Quartz
Medium: Digital Photography
Photographer: Aaron J. Greenblatt
Camera Type: Panasonic DMC-LZ7 Lumix 7.2 MP
Editing: Edited in PhotoShop 7.0 for color accuracy, size, and to apply copyright and border.

Location: Photograph taken at the 2008 Southeastern Michigan Gem and Mineral Show at the Southgate Civic Center in Southgate, Michigan. Show hosted by the Midwest Mineralogical & Lapidary Society.

Description: Sitting out in the open on a dealer's table at the show, was this large piece of citrine from Rio Grande do Sul, Brazil. It was selling for $65. This piece originally started out as probably a pale amethyst, which was then heat treated to between 470 and 560 degrees Fahrenheit - changing the purple amethyst to the yellow citrine.

About Citrine: Citrine is a variety of quartz whose color ranges from a pale yellow to brown. The name is derived from the Latin word citrina which means "yellow". Citrine has ferric (iron) impurities, and is rarely found naturally. Most commercial citrine is in fact artificially heated amethyst or smoky quartz. Brazil is the leading producer of citrine, with much of its production coming from the state of Rio Grande do Sul. Citrines whose colors have been produced by artificial means tend to have much more of an orange or reddish caste than those found in nature, which are usually a pale yellow.

Citrine made by heating amethyst may be returned to a purple color by bombarding it with beta radiation. A popular gemstone on the market is a mixture of half amethyst and half citrine called ametrine. It is made by heating an amethyst until it turns into citrine, then irradiating a part of the resulting crystal or gemstone to convert that portion back into amethyst.

Information Sources:
wiki - citrine
galleries - citrine


Legal: Copyright © Aaron J. Greenblatt. All rights reserved. Commercial use prohibited. This image and commentary may not be used for any reason without expressed written consent.


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Comments4
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rebeccauponastar's avatar
Sorry to say that that is not citrine. That would be an amethyst geode put in a kiln at high temperatures to make it orange.
As you said above its very true that most commercial citrine is in fact artificially heated amethyst or smoky quartz. Brazil is the leading producer of citrine, with much of its production coming from the state of Rio Grande do Sul. Citrines whose colors have been produced by artificial means tend to have much more of an orange or reddish caste than those found in nature, which are usually a pale yellow.