Akhet Ra - the Egyption name for the Epsitolith

In Girl in the Glass, Direktor Schmidt does not appreciate the Clypeate’s name for the giant crystals:

“Epistolith is an ignorant, imaginary name.”

Instead, Direktor Schmidt and the Obturavi use the ancient name for the giant crystals, Akhet Ra, and he explains the significance:

“The crystal’s proper, ancient title is Akhet Ra, an Egyptian term borrowed from an even older, forgotten tongue. Akhet is where the sun meets the horizon,” he elaborated, “and Ra is the sun god, father of all the gods. The combined hieroglyphs, Akhet Ra, describes the place where the gods meet the earth.

Akhet - In ancient Egyptian, Akhet refers to the horizon, specifically the place where the sun rises and sets. Akhet is more than just a geographical point. Akhet represents the boundary between the known world and the unknown, the place of both sunrise and sunset, and a connection between the earthly and divine realms. Ancient Egyptians believed the Akhet was a sacred space where the sun god Ra traveled between the earthly world and the underworld. The Akhet symbol (two mountains with the sun disk between them) represents this junction of cosmic realms.

Ra - Ra is the ancient Egyptian sun god, embodying the sun's energy, light, and life-giving force. Ra travelled across the sky during the day, journeyed through the underworld at night, and is often depicted as a man with a hawk head and a solar disk on his head. In ancient Egypt, Ra is frequently combined with other gods, such as Amun-Ra (universal power) and Ra-Horakhty (Horus in the horizon). In Girl in the Glass, Ra is the combined with Akhet, with Akhet Ra referring to the giant crystal used by the gods to reach the Earth.