10 Dollars - Charles III Guardian Angel

At 0.5 grams of .9999 gold, this belongs to the micro-gold category that proliferated sharply after 2010 as mints sought entry-level bullion products for gift markets. The Solomon Islands has no domestic gold refining capacity and issues no circulating gold coinage; the "issuer" designation here is a licensing arrangement, with the actual striking almost certainly contracted to a European mint — most likely in Poland or Austria.