Using gold for adornment seems universal. And, it seems to be the females in the culture who primarily wear it. Of course, it’s a chicken and egg kinda thing; do women value it (and the men who have it) because it’s valuable, or is it valuable because women like it?
I’ve always liked the color of copper more. And, silver seems far more shiny. However — and this goes back to the gender issue — the men would not normally have the task of polishing the stuff as it oxidizes. In other words, while a copper necklace and a gold necklace might appear equally pretty to a man, perhaps a woman would look at the copper and see not just the color, but the work that will be needed to maintain it.