Citrine
From The Gemology Project
Revision as of 20:21, 14 January 2007 by Tom Goodwin, G.G. (talk | contribs) (Conversion of 900 Degrees Farenheit to 482.2 Degrees Celsius as temperature convention . Source: "FAQ's for The Gemology Project.)
| 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
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.
