Difference between revisions of "Citrine"

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m (Conversion of 900 Degrees Farenheit to 482.2 Degrees Celsius as temperature convention . Source: "FAQ's for The Gemology Project.)
 
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{{citrine}}
 
{{citrine}}
[[Image:Citrine.JPG|left|framed|Citrine]]<br clear="left" />
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[[image:Citrine_rough_and_cut.jpg|left|thumb|250px|Citrine oval faceted on Madiera Citrine Crystals.<br />Photo courtesy of Barbra Voltaire]]
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Citrine is a yellow or golden variety of [[quartz]]. Most citrine available today is heat-treated [[amethyst]]. When amethyst is heated to about 482.2 degrees Celsius, it alters to to a golden tone. Citrine has been credited with curing urinary tract infections, jaundice and kidney ailments. This is obviously a color association.
 
Citrine is a yellow or golden variety of [[quartz]]. Most citrine available today is heat-treated [[amethyst]]. When amethyst is heated to about 482.2 degrees Celsius, it alters to to a golden tone. Citrine has been credited with curing urinary tract infections, jaundice and kidney ailments. This is obviously a color association.
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==Inclusion Images: Click on Image for Full Size==
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[[image:Citrine_banding_00.jpg|thumb|left|240px|Citrine showing color banding.This stone was originally an amethyst which was heat treated.<br />Photo courtesy of Conny Forsberg]]

Latest revision as of 09:46, 26 July 2009

Citrine
Chemical composition Silicon dioxide SiO2
Crystal system Trigonal
Habit Prismatic
Cleavage Poor
Fracture Conchoidal
Hardness 7
Optic nature Uniaxial +
Refractive index 1.544 - 1.553
Birefringence 0.009
Dispersion Low, 0.013
Specific gravity 2.63 - 2.65
Lustre Vitreous
Pleochroism Weak to distinct
Citrine oval faceted on Madiera Citrine Crystals.
Photo courtesy of Barbra Voltaire



Citrine is a yellow or golden variety of quartz. Most citrine available today is heat-treated amethyst. When amethyst is heated to about 482.2 degrees Celsius, it alters to to a golden tone. Citrine has been credited with curing urinary tract infections, jaundice and kidney ailments. This is obviously a color association.

Inclusion Images: Click on Image for Full Size

Citrine showing color banding.This stone was originally an amethyst which was heat treated.
Photo courtesy of Conny Forsberg