Hi there, Beth!
You have some lovely items, I had to favorite your shop. Really, I don't think the mix of grey and white is all that distracting but if you were to chose between the two, I'd go with the grey because it would be more universally flattering to your products.
That said, since this does seem to be an issue for you, might I suggest going with something completely different?
You have a variety of different colors and details throughout your shop, making it hard to pick a simple background, right? So I think maybe your jewelry could really benefit from being in a more "staged" environment rather than a minimilistic one.
Like these for instance:
https://www.etsy.com/listing/127553886/deep-black-and-grey-geometric-full-moonhttps://www.etsy.com/listing/96523959/cycle-crystal-necklace-vintage-bronze?ref=br_feed_9The staging can help solidify what your "brand" is as well.
That's all just a suggestion though and I do believe that your current photos are well done. :3