In 2022 the Turkish State Mint minted a non-circulation set of solar system themed, 1 Kuruş coins made of 1.55 grams of aluminum each.
If you want to see all the stats check out Numista for the 411.
In the US you can find a set on eBay for around $20 usd.
I really like this solar system set of aluminum coins, and now that I've squeezed all the value out of them that I can, it's time to be a good steward of the earth and do the right thing.
