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: | 18,8 x 11,3 x 7,2 & 10,2 x 10,3 x 5,0 mm | 重量: | | 透明: | | 数量: | | 産地: | Ratnapura, Province of Sabaragamuwa, スリランカ (Sri Lanka) | Two Sapphire crystals from Sri Lanka with unusual crystal habit. Both specimens are doubly terminated and fully intact. The colorless one shows rather the ruby crystal shape; the other sapphire crystal shows a much flattened bipyramidal shape with five twins attached. Unusual and rare specimen from Sri Lanka
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