Unlike lemon juice or wine, oil is not acidic, so it will not etch marble the way citrus does. What it is very good at is finding its way into the stone’s pores, especially around a cooktop where splatter builds up slowly, or under a bottle that has sat in the same spot for months.
Because the oil sits inside the stone rather than on it, the mark usually looks darker than the marble around it, and it can spread slightly at the edges the longer it is left.

