Tutankhamun's Treasures - Necklace of the Night Barque

Pectoral of Tutankhamun in the Form of a Gold Boat and Silver Solar (more likely Lunar) Disk with Counterpoise and Chain
Gold, Electrum, Lapis Lazuli, Green Feldspar, Carnelian, Glass
Grand Egyptian Museum #139 (Formerly JE 61897)
Length of necklace (not including pectoral or counterpoise) 23.5cm (9.25 inches), width of pectoral 10.8cm (4.25 inches)
This was found in the cartouche-shaped box and likely worn during Tutankhamun's life.

One source different than the exhibit's info card says the disc is meant to depict the moon, as it is of silver hued electrum to convey the lunar aspect. (T.G.H. James, Tutankhamun, Metro books/White Star 2000) page 210) I'm inclined to agree with James, as the lunar god Djehuty (Thoth) often has a crown like this, the crescent moon under the full moon.

Left: The reverse of this pectoral
Right: Necklace of the Rising Sun