Design enthusiast Cathy made this design choice, and it’s one that she deeply regrets. After installing Carrera marble with prominent iron lines in her bathroom, oxidization and discoloration took over. “Marble does not hold up well in steam… I want to tear my whole shower out and start over.” She goes on to say that she wishes her tile guy or the representatives at the store would’ve told her so she could’ve made an informed decision otherwise. Thanks for the warning, Cathy!