標 本 名: | コランダム (鋼玉), ルビー (Corundum, Variety Ruby)
| 化学組成: | Al2O3 | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Minh Tien Mine, Luc Yen ("Yuang Yang"; "Yueng Yang"), Yenbai (Yen Bai) Province, ベトナム (Vietnam) | Pyramidal ruby crystal from Vietnam, the crystal shows no damages and nice deep saturated red coloration. Also polysynthetic twinning is visible. The piece was found 2005!
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