Multiple choice

Which alloy was used as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks?

  1. Billon

  2. Electrum

  3. Tibetan silver

  4. Bronze

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. Electrum was used as early as the third millennium BC in Old Kingdom of Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks.