Chenier is the name for hollow tubing used in jewelry making. Also known as hollow or joint wire, this tubing is used to construct hinges and joints for lockets, watches, bracelets and safety catches, among other jewelry items. Seamed chenier is formed by bending a strip of flat metal plate and drawing it through a drawplate to the desired diameter. Seamless chenier is created using a metal disc that has been punched until it resembles a cup, then drawn to the appropriate diameter.

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This Victorian Locket Displays a Chenier Hinge.
Photo Courtesy of Lang Antiques.