Mosaic bead

175MSA
Roman mosaic bead
Date: 1 century
Mosaic glass

Bead's matrix is formed by folding a premanufactured mosaic strip over a rod. Mosaic strip is composed of sections of black/yellow concentric mosaic canes. 
Intact, very good condition.
Height 19 mm, diameter 19 mm

For similar beads see:
-Alexeeva E.M. Antichniye busi severnogo prichernomoriya, Academy of Science, Moscow, 1975, table 16: 88