5 ms·You can buy pyrite cubes on Etsy—I know because I also love them :) They’re not expensiveby Ifkaluva 6mo agoYou can buy pyrite cubes on Etsy—I know because I also love them :) They’re not expensiveSpaceL10n 6mo agoAnd Galena! Another wonderful metallic mineral that forms cubes.s0rce 6mo agoSodium chloride also grows cubes but hard to make perfect and large.