10 Dollars - Elizabeth II California Gold Rush

These miniature gold pieces — struck at 0.31 g against a 45 mm diameter, making the planchet almost vanishingly thin — were produced by the Perth Mint as part of a broader commemorative program targeting the California Gold Rush of 1848–1855. The Solomon Islands has no meaningful historical connection to that event; the attribution is a licensing arrangement, as with much of the Perth Mint's numismatic output under Pacific Island sovereign names.

The Rush itself displaced an estimated 300,000 migrants into California within seven years, collapsing the territory's indigenous population and triggering statehood in 1850, two years ahead of any plausible organic timeline.