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Glass Dictionary U |
ultramarine: A bluish-green aqua color. Ultramarine is produced by the mineral lazulite or from a micture of kaolin, soda ash, sulfur, and charcoal. undercutting: The technique of decorating glass in high relief by cutting away part of the glass between the body of an object and its decoration (e.g., on a cage cup). uranium glass: Glass colored with uranium oxide. This brilliant yellow-green glass was first made in the 1830s. |
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