Chunky Ancient Jet bead from Afghanistan
Excavated jet bead from Afghanistan. The bead is an approximately chunky 23mm x 18mm x 10mm jet bead. with 2mm bow-drilled hole. Ancient 800-1000 year old bead.
According to Wikipedia: Jet is a type of lignite, a precursor to coal, and is a gemstone. Jet is not a mineral, but rather a mineraloid. It has an organic origin, being derived from decaying wood under extreme pressure.