Purple "Pimpleback" Shell 8mm Faceted Coin Bead - 15-16 Inch 20x22-28x34mm They are often used in

They are often used in combination with crimp covers to create a polished and finished look

unique iridescent patinas (caused by centuries of burial)

Azurite is a Copper carbonate mineral that forms in masses

whose name is derived from the Greek word for Rose

Purple "Pimpleback" Shell 8mm Faceted Coin Bead - 15-16 Inch 20x22-28x34mm They are often used inA "pimpleback" is a freshwater mussel (Cyclonaias pustulosa) common in North American rivers, characterized by a thick, yellow brown to brown shell covered in bumps (pustules). While not typically purple, the inner lining (nacre) can be iridescent, and related species in the pimpleback complex are sometimes found in Texas waters.