標 本 名: | 電気石, ショール (鉄電気石) (Tourmaline, Variety: Schorl) / 石英 / 長石（グループ, 斜長石, 曹長石 ) / 白雲母
| 化学組成: | NaFe3+2Al6(BO3)3[Si6O18](OH)3(OH) / SiO2 / NaAlSi3O8 / KAl2(Si3Al)O10(OH,F)2 | サ イ ズ: | | 重量: | | 透明: | transparent - translucent | 数量: | | 産地: | Shigar Valley, Skardu District, Baltistan, Northern Areas, パキスタン (Pakistan) | Here you get a big schorl crystal almost totally covered by lustrous smoky quartz and cleavelandite. The quartz crystals are very clear and show only at one crystal some damage, art from that the specimen shows no blemish. The beautiful snow white cleavelandite covers quartz and schorl and the last mineral, which finally joined this paragenesis, was muscovite (mica). A big and impressive specimen from the Shigar valley in Pakistan.
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