"Rock salt" refers to a type of salt that is found naturally in large solid crystals. It is commonly used to melt ice on roads and sidewalks, and also for cooking and preserving food. Full definition
Keep all bags of rock salt out of the reach of your pet. (urbandognyc.com)
Cut into wedges and bake in the oven for 30 minutes with a splash of olive oil and a sprinkle of Himalayan rock salt. (superfoodie.live)
There may not be the thrill of accidentally getting a stray piece of rock salt in your ice cream, but it certainly is easier, quieter, and cleaner. (foxeslovelemons.com)