
The Dollop with Dave Anthony and Gareth Reynolds 235 - The Great Diamond Hoax
Jan 19, 2017
Dive into the audacious tale of the Great Diamond Hoax, where two cousins spun a web of deception in the 1800s. Discover how they enticed investors with a bag of uncut gems, triggering a diamond rush in San Francisco. The intrigue deepens with a staged diamond hunt and a geologist's quest to unveil the fraud. Laugh at the chaotic fallout as fortunes vanish overnight and media ridicule ensues. From ambitious dreams to epic failures, this story showcases the folly and frenzy of greed in America's gold rush era.
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The Diamond Field Planting Scam
- Philip Arnold and John Slack fooled San Francisco financiers by planting bought gems and staging a ‘diamond field’ to spark a speculative mania.
- They sold stones, collected large payouts, then vanished while investors were left exposed and embarrassed.
Prestige Multiplied The Fraud
- Expert validation amplified the con: Tiffany and prominent investors accepted uncut stones and fueled public frenzy without proper scrutiny.
- Social proof and elite names turned a small fraud into a near-financial catastrophe.
Sacks Of Planted Gems
- Arnold and Slack bought $20,000 of rough gems in London, then sprinkled them across a Wyoming site to simulate a natural deposit.
- They returned with a sack of planted stones that dazzled investors at a billiard-table reveal.


