16.5.3: Citrina
- Page ID
- 90438
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|---|---|
| Composición química | Dióxido de silicio SiO 2 |
| Sistema de cristal | Trigonal |
| Hábito | Prismático |
| Escote | Pobre |
| Fractura | Concoidal |
| Dureza | 7 |
| Naturaleza óptica | Uniaxial + |
| Índice de refracción | 1.544 - 1.553 |
| Birrefringencia | 0.009 |
| Dispersión | Bajo, 0.013 |
| Gravedad específica | 2.63 - 2.65 |
| Lustre | Vítreo |
| Pleocroísmo | Débil a distinto |
Figura\(\PageIndex{1}\): Citrino ovalado facetado sobre Cristales de Citrino Madiera.
Foto cortesía de Barbra Voltaire
El citrino es una variedad amarilla o dorada de cuarzo. La mayoría del citrino disponible hoy en día es amatista tratada térmicamente. Cuando la amatista se calienta a unos 482.2 grados Celsius, se altera a un tono dorado. El citrino ha sido acreditado por curar infecciones del tracto urinario, ictericia y dolencias renales. Esto es obviamente una asociación de color.