Ancient Greeks Called This Alloy "white Gold"

This page is the CodyCross answer for the clue below from House of Horrors, Group 1116, Puzzle 1 (Elaborate Costumes).

Question is: Ancient Greeks Called This Alloy "white Gold"

and the answer is: ELECTRUM

Word Meaning:

ELECTRUM — (obsolete) Amber.

Definitions from Wiktionary.