標 本 名: | 灰簾石, タンザナイト (Tanzanite)
| 化学組成: | {Ca2}Al3}[O|OH|SiO4|Si2O7] | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Merelani Hills (Mererani), Umba Valley, Lelatema Mts, Arusha Region, (タンザニア) Tanzania | Here you get a fine unheated Tanzanite crystal with great natural color. The crystal discloses a fine shape with termination and striation along the prism faces. You can see the pleochroism changing from light blue to violet coloration viewed along the c-axis. A fine example for a tanzanite crystal with partly gemmy areas!!
| 
