For best results, always use a salt mill with a ceramic mechanism. Salt will corrode steel and plastic will wear out eventually. Our Organic salt appears a beige colour instead of bright white like other salts. This is because it is not as processed and contains more natural minerals. This also means the salt has a higher moisture content compared to other salts. It can be used in your salt grinder, it will be more difficult to grind & I would recommend a slightly coarser grind so it flows a bit easier. But it will not damage your mill.