標 本 名: | コランダム (鋼玉), サファイア (Corundum, Variety: Sapphire)
| 化学組成: | Al2O3 | サ イ ズ: | | 重量: | | 透明: | | 数量: | | 産地: | Ratnapura, Province of Sabaragamuwa, スリランカ (Sri Lanka) | This is a slightly blue doubly terminated Sapphire crystal, which is in fact a Geuda Sapphire. Geuda Sapphire are characterized by fine rutile inclusions or also called silk which cause a milky appearance. Normally such crystals are burnt to remove the silk and enhance the blue color. Well this sapphire crystal is undamaged and for sure not treated in any way.
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