標 本 名: | 電気石, ショール (鉄電気石) (Tourmaline, Variety: Schorl)
| 化学組成: | NaFe3+2Al6(BO3)3[Si6O18](OH)3(OH) | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Shigar Valley, Skardu District, Baltistan, Northern Areas, パキスタン (Pakistan) | Here you get a bent schorl crystal grown on another schorl. The main crystal shows partly normal termination and partly healed crystalline fracture faces. The crystal seems to be tectonically deformed showing only a few very small hair cracks. The surface seems to be partly covered by very thin needle like crystals. Interesting specimen from Shigar valley.
| 
