What did a broken marriage proposal do for author Tom Zoellner? He wrote a book about the diamond pipeline titled: The Heartless Stone. The book is scheduled for release on May 30, 2006.

In a recent interview with New Times in Phoenix, Arizona, Zoellner said that after his fiancé returned the engagement ring to him, the memories associated with the diamond ring were painful reminders of the breakup. Zoellner set-out on a global journey to follow the diamond pipeline --from mine to market-- and he calls the industry "one of the most opaque" on the globe.

Find out more about The Heartless Stone book at diamonds.net.