The gold content of naturally occurring electrum in modern Western Anatolia ranges from 70% to 90%, in contrast to the 45–55% of gold in electrum used in ancient Lydian coinage of the same geographical area.
O contido de ouro do electro achado en estado natural na actual Anatolia occidental oscila entre o 70 % e o 90 %, en contraste co rango de 45 % a 55 % característico das cuñaxes en electro da antiga Lidia, na mesma área xeográfica.