But there is believed to be a lot more gold (in the area of $15 million) to still be delivered from these quartz pieces.
The finding also included an additional large specimen stone of 63 kilograms with an estimated gold content of 1,620 ounces. "These discoveries highlight the high-grade gold potential of Beta Hunt".
For context, Selby said the average gold mine pulls in 1 gram of gold per tonne, which means they would have to move the equivalent of 300,000 tonnes of rock in order to pull out the same amount of gold that RNC found.
"Given the significance of this discovery to the exploration potential and value of Beta Hunt, RNC has made a decision to consider all alternatives, including a sale", RNC said in the statement. "It's definitely a once-in-a-lifetime discovery", he said.
Australian miners often extract just 2g of gold per ton of rock - an expert said the gold particles are often too small to be seen by the naked eye - but, in this case, Canadian mining company RNC Minerals said 2,200g per ton was extracted, the BBC reports.
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The second rock weighs over 132 pounds and is estimated to contain about $2.6 million in gold.
Selby said the first of the two boulders could be the "largest gold nugget" ever discovered.
The gold was discovered by miner Henry Dole, who told the ABC it was like hitting the "mother lode".
Previous bonanza grade specimen stone occurrences at Beta Hunt, says the company, were associated with the nickel-sulphide bearing contact between the Lunnon Basalt and the overlying Kambalda Komatiite, where RNC and previous operators have mostly mined nickel. "There were chunks of gold in the face, on the ground, truly unique I reckon", according to the ABC news report.
Despite the discoveries, however, RNC Minerals still intends to sell the mine, which is typically used to generate nickel for the steel industry.
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"I'm really lucky to be seeing this - it's a rarity", he said.
WA's Goldfields has been home to major nuggets, including the famous Golden Eagle, which weighed 1186oz and was found in 1931 at Larkinville, just 40km southwest of Beta Hunt.
Security has been reinforced at the mine with armed guards on site transporting any and all new discoveries to a secure vault before being shipped to the Perth mint.
"Very, very seldom do we see results on that level", Spearing added.
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