標 本 名: | トラピッチ・ スピネル (Trapiche Spinel)
| 化学組成: | MgAl2O4 | サ イ ズ: | 38,9 x 8,8 x 8,3 & 17,6 x 8,8 x 17,6 mm | 重量: | | 透明: | | 数量: | | 産地: | Li Chaung Gyi mine, near Ohngaing (Ohn Gaing; Ohn Kai) village, north of Mogok, ビルマ(ミャンマー) Burma (Myanmar) | These are two pseudomorph trapiche spinel crystal the bigger crystal shows fully intact crystal shape the small one is also undamaged with two flat ends. Also you can see at the smaller crystal a crack parallel to the c-axis which was caused by the increasing volume during the corundum substitution by spinel. Both crystals are covered by tiny graphite lamellas.
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