High-quality natural Cognac Quartz round concave-cut gemstones calibrated to 12x12 mm (approx. 5.50 to 6.00 cts per stone). Sourced from top-grade natural rough and precision-cut in our own factory by skilled artisans, these gems feature a warm cognac-brown hue, 3D concave faceting for extraordinary fire and brilliance, 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.