標 本 名: | 電気石, (Tourmaline, Variety: Elbaite)
| 化学組成: | Na(Li1,5AL1,5)Al6(BO3)3[Si6O18](OH)3(OH) | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Shewa Pegmatite Field, Badakhshan (Badakshan; Badahsan) Province, アフガニスタン (Afghanistan) | Yellow Tourmaline crystal is always a rarity this specimen shows a colorless outer layer while the main core shows a yellow coloration with a very light tint of green. The whole crystal is without blemish and both sides are fully terminated. Scarce specimen!!
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