Close up of large the piece from previous photo-some of the calcite is lilac in color. What might be the coloring agent, please? (Author: vic rzonca)
| Dimensiones: | 600 x 400 |
| Tamaño fichero: | 25.68 kbytes |
| Captura: | |
| Modelo cámara: | |
| Velocidad obturador: | |
| Focal length: | |
| Apertura: | |
| Flash: | |
| ISO: |