Mosaic eye

27MSM
Byzantine / Islamic mosaic glass eye bead
Date: 8 - 10 century
Mosaic cane glass

Bead's matrix is made up of multiple sections of premanufactured white glass canes with black/yellow/red centers.  
Intact, good condition.
 
Height 12 mm, diameter 10 mm.

For published similar beads see:
-  V.Kovalevskaya, Komputernaya obrabotka massovogo arhaeologicheskogo materiala is rannesrednevekovih pamyatnikov Evrasii, Moscow, 2000, p.74, p.93 #250