Bowl

Collection number	ガ422-2110
Provenance	Eastern Mediterranean
Period	Imperial Roman period
Date	Late 1st Century BCE-Early 1st Century CE
Material	Glass
Dimension	D. 21.7 cm
Comment	A shallow bowl cast in reddish purple transparent glass. The interior and the mouth rim have been finished by grinding. Decorated with four grooved lines midway on the exterior, and two grooved lines on the bottom. Although there is iridescence on the surface, the bowl is intact. Pliny explained the etymology of the amethyst (a Greek word) saying, "The name which these stones bear, originates, it is said, in the peculiar tint of their brilliancy, which, after closely approaching the color of wine, passes off into a violet without being fully pronounced." Compared to the shallow bowl in cat. no. 116, the strong reddish coloring of this piece gives us a glimpse of the aesthetic appreciation of the color tone of red wine. Violet is obtained by adding manganese to glass, but since the process requires adding twenty to forty times the quantity of coloring agent as when cobalt is used, and a strong reduction atmosphere, sophisticated skills were necessary.
Classification	glass vessel
Keywords	Purple, Clear Beautiful, Noble, Vivid Western Asia, Eastern Mediterranean, Syria Roman-Byzantine Period, Roman Period Glass Vessel, Bowl, Dish/Plate Pattern, Circle/Ellipse
資料ID	334