A cabochon is a gemstone that has been shaped and polished but not faceted. This smooth, rounded style enhances the stone's natural color and pattern, making it popular in jewelry. Common materials used for cabochons include agate, jasper, and turquoise, among others. Cabochons can vary in size and are often used in rings, pendants, and earrings. The lack of facets allows for a more straightforward appreciation of the stone's beauty, making cabochons a favored choice for both collectors and jewelry designers.