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: | Gem gravels around Ratnapura, Ratnapura District, Sabaragamuwa Province , スリランカ (Sri Lanka) | This sapphire cabochon from Sri Lanka shows instead of six-ray asterism at 12-ray star!! Normally rutile inclusions causing the six-ray effect. In this case hematite inclusions are additionally hosted by this sapphire and reflecting the light in between the already existing six-ray pattern and in this case the star is also well centered. 12-ray star sapphires are a much rarer find!
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