Flat biconical cobalt blue Roman glass bead from Lincolnshire

Based on a description from Guido's book on Roman beads of Britain, 'The Glass Beads of Prehistoric and Roman Periods in Britain and Ireland'.

Flat, biconical cobalt blue bead from Binbrook, Lincolnshire. It is a lovely shape and perfect size for use on a cord or in a necklace.

The bead is approximately 8mm x 25mm with a 5mm hole