Are there precious metals in the mantle?

Excuse me, I'm quite curious about the composition of the mantle. Are there precious metals lurking within its depths? The mantle, being a significant layer of the Earth's structure, surely holds many secrets. Could it be possible that among its rich mineralogy, there are traces of gold, silver, or other valuable metals? It would be fascinating to know if these resources, so prized in our world, exist in such a fundamental part of our planet. Could you elaborate on this, perhaps sharing any insights or hypotheses you might have?