Vera Salt’s Crystal Grinder Refill is filled with our high-purity spring salt crystals that are naturally formed and hand-harvested from a protected mineral spring, far from human industry. These unrefined, coarse crystals are ideal for use in any salt grinder or mill. Whether you're seasoning proteins, finishing roasted vegetables, or adding a fresh crack of salt at the table, these crystals dissolve evenly and deliver a bright, clean flavor. Each container refills our Spring Salt Grinder up to four times and is an essential staple for everyday cooking and finishing. Third-party tested for microplastics and heavy metals, including: Aluminum (Al), Arsenic (As), Cadmium (Cd), Lead (Pb), and Mercury (Hg). Our high-purity white salt crystals are composed of minerals including: * Potassium (K): 294ppm * Magnesium (Mg): 382ppm * Calcium (Ca): 1,034ppm Sourced from an ancient spring in Spain. Harvested by hand via traditional methods, not subject to any processing or bleaching. 100% plastic-free packaging made of cardboard and an inner bag made of biodegradable, compostable potato starch. As a result, the salt never comes in contact with plastic. Storage conditions: After opening, store in a cool, dry place. There may be some clumps as we do not use any additives, preservatives, or anti-clumping agents.