It's the kind of photo that one would expect to see from the 1850s, in black and white, with the man wearing breeches, a wide-brimmed hat, and a bandana around his neck.

But even though it's 2023, experienced prospector Darren Kamp says he's never seen a rock like it before in his life.

"When it hit my hand, my jaw dropped with it," Kamp told CNN on Tuesday. "It was just incredible. Once-in-a-lifetime find."

Kamp runs Lucky Strike Gold which runs recreational prospecting trips into the gold-containing regions of Australia known collectively as the Golden Triangle, a profession he's been engaged in for 43 years.