Jasper, an aggregate of microquartz and/or chalcedony and other mineral phases, is an opaque, mpure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron inclusions. The mineral aggregate breaks with a smooth surface and is used for ornamentation or as a gemstone. It can be highly polished and is used for vases, seals, and snuff boxes.The pendent bead is on a 26 inch sterling silver chain. The jasper bead is about 2 inches long. The earrings are on nickel free French hooks. The earring jasper beads are about 1 1/4 inches long.