This stunning cushion-cut blue sapphire, weighing 3.43 carats (3.77 ratti), is a natural and transparent gemstone. The violetish blue color and excellent cut grade make it a highly sought-after piece. The gemstone is unheated and untreated, with a refractive index of 1.762-1.770. The gemstone comes with a lab certificate from IGI, ensuring its authenticity and quality. It has a specific gravity of 4 and measures 10.83 mm in length and 9.20 mm in width, with a depth of 2.96 mm. This gemstone is perfect for jewelry and watch accessories, and it has been sourced from Sri-Lanka (Ceylon).