John Lennon wore this necklace often during the late 1960's, and it was his sole "clothing" for the nude cover photograph for John & Yoko's "Two Virgins" album in 1968.
The 20" long piece is handcrafted from leather with Indian swirl stones and glass rings and flowers. The necklace is estimated to be worth between $500,000 and $600,000. It's part of the 'Gotta Have It!' Online Rock & Roll Art Auction, ending August 6, 2008.