Tal·mi gold 
(tälmē)
(tälmē)n.
Brass plated with a thin sheet of gold, used in making jewelry.
[German Talmigold, partial translation of French Tal. mi-or, contraction of Tallois demi-or, Tallois half-gold : Tallois (after Tallois, 19th-century Parisian inventor) + demi-, demi- + or, gold.]