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 very fine, natural blue Sapphire crystal with at least nine twinned crystals attached. The specimen is absolutely untreated and shows partly “Geuda-areas” blue undamaged Sapphire crystals combined with fine bipyramidal shape and even attractive twinning are a rare find. This specimen is a highlight for any corundum collector .
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