Difference between revisions of "Citrine"
From The Gemology Project
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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. | ||
| + | ==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 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.
