Does baking soda scratch gold jewelry? I’m unsure if it’s plated but I've a pendant that looked tarnished. I soaked & rubbed w heat water & Dawn. fifteen min in I grabbed some baking soda & built a paste & rubbed. This kind of complete is fairly common with Adult http://trentonlucjo.topbloghub.com/101070/the-ultimate-guide-to-deep-cut-diamond