Purple "Pimpleback" Shell 8mm Faceted Coin Bead - 15-16 Inch R0471 this semi-precious variety of quartz

this semi-precious variety of quartz is found in many locations around the world

5 billion years ago

Kambaba Jasper is a sedimentary stone comprised of microcrystalline Quartz interlaced with Stromatolites — ancient fossilized colonies of primeval microorganisms

Some are larger and more defined

Purple Crazy Lace Agate is actually Mexican Crazy Lace Agate that has been color enhanced with purple to bring out the beautiful patterns in the stone

Purple "Pimpleback" Shell 8mm Faceted Coin Bead - 15-16 Inch R0471 this semi-precious variety of quartzA "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.