Difference between revisions of "Citrine"
From The Gemology Project
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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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[[Image:Citrine.JPG|left|framed|Citrine]]<br clear="left" /> | [[Image:Citrine.JPG|left|framed|Citrine]]<br clear="left" /> | ||
− | Citrine is a yellow or golden variety of [[quartz]]. Most citrine available today is heat-treated [[amethyst]]. When amethyst is heated to about | + | 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. |
Revision as of 20:21, 14 January 2007
Citrine | |
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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.