Stratified eye

322EA
Stratified eye bead    
4 century BC
Persia

Turquoise matrix with a sand core. Three stratified eyes with 4 - layers (alternative white/ brown with blue center). 

Diameter: 7 mm
Height:    5 mm
Intact. Very good condition.

For similar archaeological beads in museums collections see: 

-Kunter K. Glasperlen der vorromischen Eisenzeit IV. Schichtaugenperlen. Marburger Studien, 1995, taf. 2: 41
-Alexeeva E.M. Antichniye busi severnogo prichernomoriya, Academy of Science, Moscow, 1975, table 16: 42.