I bought about 250 grams of black salt recently. I bought it as a flavour enhancer, specifically to use on tofu so it will have an 'eggier' taste - it's a vegan thing.
Anyway, opened up the packet today. The crystals - lava chunks, more properly - are about the size of quails' eggs and don't have much of an odour. Until ground, that is... and then, wham! my kitchen turned into a giant, oozing sulphur spring.
I needed only a few grains for my tofu 'egg' salad, so sprinkled a few on... but a couple of minutes in, and I couldn't handle the smell. I saved the tofu - rinsed it off and re-seasoned with yeast - but have no idea what to do with the rest of the black salt.
Any ideas? It's not valuable - I think I paid about 3 dollars for the packet - but I don't like wasting things. Any non-food uses for it? In the bath, as a spa thing? Pickles?