標 本 名: | コランダム (鋼玉), サファイア / スピネル (Corundum, Variety Sapphire / Spinel)
| 化学組成: | Al2O3 / MgAl2O4 | サ イ ズ: | | 重量: | | 透明: | translucent - subtranslucent | 数量 : | | 産地: | Mogok Stone Tract, Mandalay Division, ビルマ(ミャンマー) Burma (Myanmar) | Here you get a big sapphire crystal covered by a several millimeter thick layer of spinel crystals. The spinel crystals are apart from two areas at the smaller sides, totally undamaged and revealing dozens of triangle faces in a white, slightly pinkish to purplish coloration. At the base you can see a kind the fibrous colorless to blackish changing sapphire crystal - a really big sized and unusual specimen from Burma.
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