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: | Palelni mine, Khetchel (Khat Che) village, Molo quarter, Momeik Township, ビルマ(ミャンマー) Burma (Myanmar) | Here you get a rare tourmaline crystal; one prism side is slightly polished and disclosing a cats eye effect. Bronze colored tube-like inclusion causing this chatoyance along the c-axis.
In fact the crystal is not black the base is for a few millimeters opaque followed by a part which is yellow in transmitted light. A very unique “Schorl” crystal from Burma!
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