10 Dollars - Charles III Barcelona

At 0.155 grams, this is among the smallest gold coins produced for the commemorative market — a format pioneered largely by the Perth Mint and quickly adopted by sovereign issuers seeking low entry-price bullion products. The Solomon Islands attribution is nominal; legal tender authority is assigned by the government, but production and distribution run entirely through private minting channels.

Charles III's accession in September 2022 triggered an enormous wave of commemorative issues across Commonwealth and non-Commonwealth mints alike, many struck to fractional weights specifically to capture collector demand at accessible price points.