これはさすがに贋作ですかね。
1g入ってるなら地金文より安い気が……

https://www.ebay.com/itm/Palau-2019-1-Four-Leaf-Clover-19-1g-Gold-9999-Proof-Coin/233238418864?hash=item364e17d5b0:g:K4kAAOSwtjVc6dn8

https://www.ebay.com/itm/Palau-2017-1-Four-Leaf-Clover-1g-Gold-9999-Proof-Coin/233238418532?hash=item364e17d464:g:tcYAAOSwkKhc6dm7