Purple Spine Oyster Shell Oval | 16x10x6 | Purple Orange | 6 Bead(s)Purple Orange Purple Spine Oyster Shell Oval Beads for Jewelry Making. Great for earrings. The shells of the Spiny Oyster are rare finds and are especially treasured by Native American Indian artists for their beautiful red, pink, brown, yellow, orange, purple, and white colors. Many Zuni artists started creating with Spiny Oyster once Coral was endangered and unable to be mined. Orange spiny oyster can range in color from yellow to orange to red.