Jasper is an opaque variety of chalcedony that often exhibits interesting patterns and colors caused by impurity inclusions. Jasper differs from agate in that agate is typically translucent and banded, or translucent with visible inclusions that form moss, plume or flame shaped patterns. Jasper is typically red, brown, orange, yellow, gray or green and is often associated with iron ores. High quality specimens of jasper can be polished to a very high luster and are often cut into cabochons or beads for use in jewelry. Jasper is also used to produce tumbled stones and a variety of lapidary products. Shown in the photo are two cabochons of Wild Horse Jasper from Oregon.