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) | Beautiful colorless and very clear Sapphire crystal from Sri Lanka. Almost all terminations are undamaged and except the one all showing flat faces with more or less distinctive grown trapiche pattern. Attractive cutting grade specimen
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