In the 1950s, local farmer and teacher Ron Purvis adapted the skil-saw concept by implementing a diamond rotary blade. This enabled the carving of the many immense jade boulders which line the banks and bed of the Fraser and Bridge Rivers, which were on the one hand immovable and on the other would shatter or striate if blasting was used to break them. Purvis' innovation was revolutionary in the jade mining business and larger versions of his saw are at use in the Cassiar region. There are no major commercial jade mines in the Lillooet area today, although local shops still carry polished jade souvenirs.