Finds like that are not uncommon in our part of the world.
"The Golden Mile" (the mining area at the southern end of Kalgoorlie) is known as the richest square mile on earth.
My family were pastoralists and prospectors; we had Mt Carnage Station at nearby Ora Banda for 50 years.
They found a lot of gold. According to the family records, 7,300 ounces which is worth around $19 million Aus at today's price.
I remember in 1968 my father, grandfather and uncle returning back to the homestead very excited (and *****; they had drunk all the beer in the landrover on the way home), and emptying 230 ounces of specimen gold (nuggets) out of a couple of billycans onto the kitchen laminex table.
They had just found a patch of gold, which they had loamed up (tracked) from a few colours of gold in a hand held pan.
Happy days.
Years later dad sold the lease to Western Mining and it became a major open cut mine.
Dad's dying words to me were "All that gold out there, and I didn't find it".