Huge gold-encrusted rocks estimated to be with millions of dollars were discovered last week in a Western Australia mine — a find that experts are calling "rare and very exciting," BBC News reported.
Canadian miner RNC Minerals said workers at the Beta Hunt mine, located roughly 391 miles east of Perth, uncovered the gold specimens that are estimated to be worth more than $15 million.
The largest specimen, quartz rock, weighs over 198 pounds and contains about $3.8 million in gold, the Australian Broadcasting Corporation reported.
The second rock weighs over 132 pounds and is estimated to contain about $2.6 million in gold.
Experts are astounded by the find.
"You might go your whole life and you'll never see anything like it. It's definitely a once-in-a-lifetime discovery," said senior geologist Zaf Thanos, according to ABC News.
"This sort of bonanza zone is incredibly unique."
Prof Sam Spearing, director of the Western Australia School of Mines at Curtin University, told BBC News that it was uncommon to find such massive gold encrusted rocks.
"People do still record finding nuggets in the goldfields, but typically they are less than several ounces," he said. "Very, very seldom do we see results on that level. This is an exceedingly rare find and very exciting."
Several weeks prior to the find, RNC Minerals said miners uncovered 1,500 ounces of high-grade gold from other sediment structures at the site.
The company's CEO, Mark Selby, said the specimens "could rank among the largest ever discovered" and underlined "the importance of this discovery."
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