High-quality natural Sky Blue Topaz round-shaped concave-cut gemstones calibrated to 10x10 mm (approx. 4.00 to 4.30 cts per stone). Sourced from top-grade natural topaz rough originating from Brazil, Africa, and India and treated via standard, stable irradiation to achieve a vibrant sky blue color, these gems are precision-cut in our own factory by skilled artisans. They feature specialized 3D concave faceting for intense light diffusion, extraordinary internal brilliance, clean eye-clean clarity, and fine surface polishing. Ideal for solitaire rings, pendant centers, drop earrings, and custom fine fashion jewelry designs. Wholesale bulk quantities and custom orders available upon request.