Gross weight 75 grams.
19th century period.
Niellage is a goldsmithing technique which consists of applying niello, which means "blackened" in Latin, a black metallic sulphide which includes, among other things, copper and silver. It is used as a filler in metal marquetry. The engraved metal is filled with this molten alloy along the lines produced by the chisel engraving, then the niello surface is polished to eliminate excess added metal. A technique known since antiquity in Egypt, it was forgotten from the 17th century before becoming fashionable again in the 19th century thanks to the damascener André Colomb (1786-1838).