Glass mosaic fragment
Not on view
Thick base fragment, probably from a deep, footed ribbed bowl.
Translucent deep purple, cobalt blue, and opaque white.
Two layers fused together, forming a convex disk.
Exterior layer: ribbon mosaic pattern formed from sections of a single cane in purple ground with white and blue threads in parallel lines; interior layer: spiraling mosaic pattern formed from sections of a single cane in blue ground with white threads.
Polished convex exterior; pitting of surface bubbles and weathering in cracks; dulling, creamy weathering, and faint iridescence on exterior and jagged edges.
Probably part of a deep ribbed bowl with base ring, but cut down, possibly in antiquity, into a disk.
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