
One of the most striking features of Hellenistic glassworking was the development of the mosaic technique. Vessels were prepared from the fusion of segments of colorful glass, both translucent and opaque, in arresting combinations of colors and shapes.
From the Israel Museum publications:
Israeli, Yael, Ancient Glass in the Israel Museum: The Eliahu Dobkin Collection and Other Gifts, The Israel Museum, Jerusalem, Israel, 2003