Amethyst
| ID | 148 | |
|---|---|---|
| Mineral | Amethyst | |
| Location | Iraí - Rio Grande Do Sul - Brazil | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Amethyst information at mindat.org |
|
Mindat data
| ID | 198 |
|---|---|
| Long ID | 1:1:198:0 |
| IMA Status |
0 1 |
| Variety of | 3337 |
| Entry type | 2 |
| Description | A violet to purple variety of quartz that owes its color to gamma irradiation (Berthelot, 1906) and the presence of traces of iron built into its crystal lattice (Holden, 1925). The irradiation causes the iron Fe(+3) atoms that replace Si in the lattic... |
| Other Occurrences | Very common, in many different environments. The commercially most important occurrences are in volcanic rocks, where amethyst crystals outline former gas cavities. In low and medium temperature hydrothermal veins associated with iron ores. As late overgrowth ("scepter quartz") on quartz in pegmatite and alpine-type environments. |
| Colour | Violet - purple |
| Hardness (min) | 7.0 |
| Hardness (max) | 7.0 |
| Lustre | Vitreous |
| About the name | From Greek "a-methystos", meaning not drunk. |
| Crystal System | Trigonal |
Details
Price: € 5
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| O | Oxygen | |
| Si | Silicium |