Rav Gedalya Schorr in Ohr Gedalyahu (2nd maamar on parshas Terumah) writes that kesef (silver) hints to a desire of love of G-d in man, while zahav (gold) hints at the awe of the L-rd. He brings some ...
What's the difference in Biblical Hebrew between "zahav" and "paz"? Artscroll calls one "gold", the other "fine gold." Any other distinctions?
Besides for the minhag that one should not wear jewelry on Yom HaKipurim because of the "fear of the judgment" there is also the minhag to not wear gold (even as a decoration on a tallis or kittel) ...