Natural Unheated Blue Sapphire – 4.00 ct – Certified ALGT Beautiful natural blue sapphire weighing 4.00 carats, expertly cut in an elegant rectangular cushion (mixed cut), displaying a vivid purplish-blue color with excellent brilliance and transparency. According to the accompanying ALGT Gemstone Identification Report (No. 10502904), the sapphire is a natural corundum with no indications of heating, making it an attractive choice for collectors, investors, and fine jewellery. Specifications * Gemstone: Natural Sapphire (Corundum) * Weight: 4.00 ct * Dimensions: 9.84 × 6.73 × 6.18 mm * Shape: Rectangular Cushion / Mixed Cut * Colour: Blue (Purplish Blue) * Transparency: Transparent * Treatment: No indications of heating * Certificate: ALGT (Antwerp Laboratory for Gemstone Testing) A beautiful untreated sapphire with excellent visual appeal, suitable for a bespoke jewellery creation or as a valuable addition to a gemstone collection. The original ALGT certificate is included.