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: Sulphides
Sulphide Portrait Plaque
France
Baccarat (attributed), circa 1830
Diameter: 6 cm (2 3/8 inches)
(702486)
Circular clear glass plaque with faceted edges, enclosing a sulphide profile portrait of a man, possibly French mathematician Blaise Pascal (1623-1662); gilded metal ring and collar
Photo by Gary Andrashko, Illinois State Museum