標 本 名: | エルバイト(トルマリン), (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: | Pyan Gyi mine (West of Pyan Pyit), northeast of Mogok, ビルマ(ミャンマー) Burma (Myanmar) | A very rare prismatic Tourmaline crystal from a metamorphic limestone are, where normally only spinel and short prismatic or twinned uvite (rose-tourmaline) crystals are found. The specimen shows a light color change! This must be caused by a light vanadium and chromium content. Chemically the crystal might be an uvite not an elbaite. In either way this is a very rare and fully intact crystal !
| 
