One-of-a-kind gold nugget, measuring nearly 11 inches in length and weighing 1,241 grams (39.9 troy ounces), estimate: $70,000-$100,000. Courtesy of Heritage Auctions

One-of-a-kind gold nugget, measuring nearly 11 inches in length and weighing 1,241 grams (39.9 troy ounces), estimate: $70,000-$100,000. Courtesy of Heritage Auctions

One-of-a-kind gold nugget, measuring nearly 11 inches in length and weighing 1,241 grams (39.9 troy ounces), estimate: $70,000-$100,000. Courtesy of Heritage Auctions

One-of-a-kind gold nugget, measuring nearly 11 inches in length and weighing 1,241 grams (39.9 troy ounces), estimate: $70,000-$100,000. Courtesy of Heritage Auctions

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