Petrified Wood beads are a fossilized wood with the mineral composition of jasper, chalcedony and opal. The colors are mostly grey, brown, rarely but sometimes red, pink, yellow and blue violet. The most important location is the Holbrook Arizona mine were fossilized tree trunks from 200 million years ago are weathered in sandstone and are splendidly colored. The stone can be mined on all continents due to the mineral and tree composition found worldwide.