標 本 名: | スピネル (Spinel)
| 化学組成: | MgAl2O4 | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Pyan Pyit (Pein Pyit) Mine, northeast of Mogok, Shan State, ビルマ(ミャンマー) Burma (Myanmar) | Fine spinel specimen to study the beginning of a cyclic spinel twin. You can see the octahedron shape and out of two crystal faces at one side a twin after the spinel law appears. If this would happen again two times you would get a perfect cyclic spinel twin. This crystal has fully intact faces and points with fine luster. Moreover you can see beside the spinel- law twinning a parallel twinning as well !
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