Wampum Shell 12x15mm Carved Shell Bead - 15-16 Inch 10x25mm colored by trace amounts of

colored by trace amounts of chromium and/or vanadium to range in hue from yellow to green to blue to green

Common Opal is generally opaque

Opals are hydrated amorphous forms of silica

Approximate Size:   3x4 Inches / 76x101mm / 7

Lepidocrocite forms when iron-containing substances rust underwater

Wampum Shell 12x15mm Carved Shell Bead - 15-16 Inch 10x25mm colored by trace amounts ofWampum is made from one of the hardest and most beautiful shells in the world: the Northern Quahog, a clam found along the New England coast. The white and purple layers of the shell create beautiful patterns. Only a small percentage of Wampum shells have deep layers of purple and are thick enough to make beads.