Online at above link

The Oxford Art Online resources include Grove Art Online, the Concise Oxford Dictionary of Art Terms, the Encyclopedia of Aesthetics, and the Oxford Companion to Western Art, all of which you may search for basic information on a variety of art media, including metalwork.

Social Sciences, Health, and Education Library Reference [non-circulating]

This work offers "detailed information about the historical, cultural, social, religious, economic, and scientific significance of gold, across the globe and throughout history." Includes bibliographical references and an index.

Architecture & Art Reference [non-circulating] and Architecture & Art

Includes 2,373 entries relating to British and North American wares, decorative techniques and styles, and leading designers and makers, mainly from around 1500 to the present.

Architecture & Art Reference

A 4-volume encyclopedia of 19th- and early 20th-century bronzes and their makers.

Architecture & Art Reference [non-circulating]

Includes definitions of types of jewelry, materials used, properties, and techniques used in jewelry-making.

Architecture & Art Reference [non-circulating]

A guide to marks used by metalworkers, furniture-makers, and pottery-makers. Includes a bibliography and an index.

Main Stacks and Online at above link

This encyclopedia on antique metals, furniture, pottery and porcelain, glass, and textiles includes entries about materials, styles, techniques, and more. With biographies of artisans and a bibliography.