Hey All. This granite (White spring i think) shower wall has what apears to a be rust stain down near the pan and also looks like some moisture in the stone up the wall about a foot or so. Had some small cracks in the grout around the edge of the pan that the homeowner caulked grout otherwise good condition.I opened a small area (1") in the grout under the stain and did not detect any water. Could the stain be from just the shower moisture? Is this granite prone to rust? Thanks
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