High-quality natural London Blue Topaz round smooth cabochons calibrated to 12x12 mm (approx. 6.50 to 7.20 cts per stone). Sourced from top-grade natural topaz rough and precision-cut in our own factory by skilled artisans, these gems feature a deep, rich London blue hue with a smooth dome, intense luster, and high surface polish. Ideal for solitaire rings, pendant centers, cuff links, and custom fine fashion jewelry designs. Wholesale bulk quantities and custom orders available upon request.