High-quality natural Conic Quartz concave pentagon-faceted gemstones calibrated to 10 mm (approx. 3.00 to 4.00 cts per stone). Belonging to the quartz gemstone family, each stone is cut and polished in our own factory by skilled artisans. Featuring precision concave faceting that maximizes brilliance and surface luster, these gems are ideal for statement rings, pendant centers, drop earrings, and custom fine jewelry designs. Wholesale bulk quantities and custom orders available upon request.