Natural Swiss Blue Topaz 21.79 ct – Square Cut, ČGL Certified

This 21.79 carat natural Swiss Blue topaz from Brazil showcases a vivid and saturated blue hue, cut into a square shape measuring 16.51 × 16.23 × 10.05 mm. With eye clean clarity, the gemstone offers superb transparency and brilliance, enhanced by its precise faceting. Its color has been achieved through irradiation, a safe and standard treatment used on all blue topaz varieties. Certified by the Czech Gemological Laboratory (ČGL), it comes with independent verification of its authenticity and q