標 本 名: | コランダム (鋼玉), ルビー / スピネル (Corundum, Variety Ruby / Spinel)
| 化学組成: | Al2O3 / MgAl2O4 | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Mogok Stone Tract, Mandalay Division, ビルマ(ミャンマー) Burma (Myanmar) | This is a well shaped spinel octahedron with deep violet red ruby crystals on the surface. The corundum crystals disclosing a prismatic shape with good luster with crystals striation and also polysynthetic twinning viewed under the loupe. Here you get really rare paragenesis.
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