This sterling silver cabochon mounting holds one 8mm round cameo or cabochon. It features a rounded-square design and a decorative, open filigree pattern and can be used vertically or horizontally. The teardrop-shaped openings on the top, bottom, and sides accommodate a 18-ga. jump ring or wire for easy use. Cabochon mountings feature a flat, sometimes open, base and raised edges with two to four prongs that hold a cameo or cabochon securely in place. A classic choice, the 4-prong setting supports the gemstone on four sides.