Dimensions - 10.65 x 7.56 x 7.30, in mm. Clarity - Transparent, VVS, Loupe Clean. Colour details - Blue/Srilankan Cgl Given Conflower Blue. Lustre - Vitreous Report.No - GRS2026-048839 Shape - Oval Cut - Faceted Measurement -10.65 x 7.56 x 7.30 mm Color - Blue Treatment - Noheated Origin - Srilanka (A beautiful 5.11 ct Natural Blue Sapphire from the renowned gem deposits of Sri Lanka (Ceylon). This gemstone displays an attractive blue color with excellent brilliance and luster, making it an outstanding choice for collectors, investors, and fine jewelry enthusiasts. What makes this sapphire particularly desirable is that it is unheated, meaning it has not undergone any heat enhancement to improve its color or clarity. Unheated sapphires are highly sought after due to their rarity and natural beauty. The gemstone is accompanied by a GRS (GemResearch Swisslab) Certificate, confirming its natural origin and reporting no indications of heating. Sri Lankan sapphires have been prized for centuries for their exceptional quality and are among the most respected gemstones in the world.) Treatments. Note: no indication of heating . If you are not sure whether the gemstone is treated, mention this as well. If a ruby, sapphire, emerald or diamond is untreated please provide proof with a certificate. Method of shipment.