Mineral: | Corundum, Variety: Sapphire
| Chemical Formula: | Al2O3 | Size: | | Weight: | | Transparence: | transparent - translucent | Quantity: | | Origin: | Gem gravels around Ratnapura, Ratnapura District, Sabaragamuwa Province, 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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