Natural blue-violet sapphire with a rich, saturated color and a distinctive hexagonal step cut. This stone is untreated, with no indications of heating, which is increasingly rare and highly valued by collectors. Details • Species: Natural Corundum • Variety: Natural Blue-violet Sapphire • Weight: 4.29 ct • Dimensions: 10.87 x 8.94 x 3.83 mm • Cut: Step / Step • Shape: Hexagonal • Color: Blue-violet • Transparency: Transparent • Treatment: No indications of heating (NTE) • Phenomena: None • Comments: None Certification Accompanied by an ICA GemLab (International Colored Gemstone Association) report, no. TH26G133226, dated 14 October 2026. Testing included microscopic examination and FTIR spectroscopy. The report can be verified via the QR code on the certificate. Why it stands out • Over 4 carats of natural, unheated corundum • Unusual hexagonal step cut, ideal for a statement ring, pendant, or collector's piece • Appealing blue-violet hue, with a depth of color that photographs well in natural light • Independent lab certification