For the Ancient Egyptians:
(1) Gold had no economic importance. It was only important for their religion. With their eyes we are supposed to "see" divine, indestructible (color of) sun and not a huge pile of money.
(2) Silver was more precious than gold.
If fact (1) and (2) are both valid for the Ancient Egyptians the question is: what are we supposed to "see" with or for silver? Moon (color of)? Sun (another color of)? Primeval mond where the first rays of the morning sun rise or shine (benben stone)? Or ... Is there or could there be have been some religion in Ancient Egypt that worshipped the moon?
The source for (1) is found on The Internet (here) and is not substantiated with source references. On the other hand there are numerous source references for (2).
More details on silver. According to 'Shaw and Nicolson' silver was in the beginning of the Ancient Egyptian civilization, in the Old Kingdom (2681-2181 BC) more precious than gold. In the Middle Kingdom (2055-1650) gold was more precious than silver. It seems that they regarded silver ("white metal") as a variety of gold.
Sun, moon, other five known planets ("stars that know no rest") and stars what were they for the Ancient Egyptians? Answer: all of them travel during the night through the body of goddess Nut. They represent the unchangeable, undistinguishable and reciprocal cycle of birth and death. All this is painted, in great details, on the ceiling of the tomb of Pharaoh Ramesses VI (KV9 in the Valley of Kings):
Detail of the journey of the sun in her body:
Born as white sun in the morning:
Swallowed as red sun in the evening:
- Sunrise was rebirth
- Morning was childhood
- Afternoon was maturity
- Evening was old age
- Night was death and renewal
Thoth as ibis or ape is the god of the moon. He is the shipper and the writer of the gods. He regulates the times and seasons. He makes eternity and everlastingness.
Thoth is the black eye of Horus. The moon in all its appearances (from black moon to full moon).
According to 'Shaw & Nicolson' gold was the flesh of gods and silver their bones. The Ancient Egyptians had no coinage but gold could also serve the living by melting it down as exchange and as reward for individuals ('golden fly of valour' in New Kingdom).
Preliminary conclusion/ hypothesis. Sun and moon travel for the Ancient Egyptians both through the same unchangeable cycle inside the goddess Nut. A reciprocal cycle of birth and death. Gold represents the flesh of gods and silver its bones. There seems to be no indication that silver represents the moon, the color of a silver moon. The moon as representation of god Thoth makes time and the seasons. Read in month the 'moon'. Better: moonth.
1. Wallis Budge, E.A., 'The Gods of the Egyptians, studies in Egyptian Mythology', volume I (New York 1969) page 400-415.
2. Betrò, Maria Carmela, 'Hiërogliefen. De beeldtaal van het oude Egypte' (Baarn 1999) page 153, 176 and 245.
3. Shaw I. and Nicholson P., 'The Illustrated Dictionary of Ancient Egypt' (Cairo 2008) page 46, 131, 150-151 and 304-305.