Here is a sampling of cabochons cut from *petrified wood, an unusual and rare form from Hell's Canyon near the Idaho/Oregon border. It is said to be sequoia, showing fascinating wavy annual growth lines in a herringbone pattern. These examples have great contrasting lines & other figure, and tiny embedded thundereggs, as well as amazing patterns of elongated holes. Very beautiful* material from a unique deposit, the like of which will probably never be discovered again.