After an impromptu tear out of a much detested 80’s vanity we discovered that the layer of newer vinyl flooring didn’t cover the area underneath. The exposed ‘tile’ is unusual, does not have grout lines and looks a tad like dense cardboard. We’re planning to demo it to the subfloor so we can install ceramic or stone tile, but I’m both curious about the type and a tad concerned about possible asbestos content. A portion of it seemed to flake off fairly easy when we removed the vanity, so it doesn’t seem to be the old vinyl tiles I’m reading about, but they are definitely in the categorical age range and 9” x 9” size of tiles to watch out for. Please see the attached photo. Any thoughts? And thanks for any input!