Understanding Anti Etch Protection for Stone Countertops Natural stone countertops are admired for their beauty, character, and durability. Whether it's marble, limestone, or another type of calcite-based stone, these surfaces add a timeless look to any kitchen or bathroom. But for all their visual appeal, they come up with one major vulnerability—etching. This common issue has long frustrated homeowners, particularly those who love the elegance of polished marble.