Purple "Pimpleback" Shell 8mm Faceted Coin Bead - 15-16 Inch Rainbow Tiger Eye sometimes with inclusions of Black

sometimes with inclusions of Black Tourmaline

rainbow effect of light refracting off of the air bubbles inside of the stone

Since this is a natural stone

Approximate Size: 1

it is born in the molten rock of the upper mantle

Purple "Pimpleback" Shell 8mm Faceted Coin Bead - 15-16 Inch Rainbow Tiger Eye sometimes with inclusions of BlackA "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.