Lady of Lourdes Pendant Necklace

I fell in love with this brand and all the marketing they do on social media. Beautiful layered pieces, especially for the modern Catholic aesthetic. When it arrived I was surprised at how small it was, but liked it enough to keep it. I layered it with other pieces from different designers. About a month in, I noticed that my neck was turning gray, like I was wearing cheap jewelry. Upon further inspection I saw that the chain on this had completely lost all the gold “fill” and was copper and turning my skin gray- green. At this price point, it should last much longer than a month.