標 本 名: | 電気石 - ショール (鉄電気石) / 石英 / 金雲母/ 曹長石 (Tourmaline, Variety: Elbaite - Schorl / Quartz / Albite)
| 化学組成: | Na(Li1,5AL1,5)Al6(BO3)3[Si6O18](OH)3(OH) / SiO2 - NaFe3+2Al6(BO3)3[Si6O18< | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Stak Nala, Haramosh Mts., Skardu District, Baltistan, Northern Areas, パキスタン (Pakistan) | A tourmaline cluster intergrown with albite and quartz. Two lateral tourmaline crystals are damaged all others disclosing terminated faces. The upper part of the crystals is green while the lower part is black. The crystals is showing fine luster and clarity. Beside this you can see a few sprays of fine rutile crystals. Nice tourmaline paragenesis from Pakistan.
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