In ancient Egypt, gold, silver and electrum were the metals of choice for making jewelry. Due to its brilliance and incorruptibility, gold was associated with the Sun and the concept of immortality (hence the decision to make the bodies of gods from gold).
Silver was associated with the Moon, and was used for the bones of the gods. In its natural state or when produced artificially, electrum is a composite of gold and silver. As a result, it assumed symbolic functions.
Amulet showing the head of the god Osiris. Late Period, ca. 664-332 BC. Now in the Egyptian Museum of Barcelona. E 506JA