Pair of Anglo Saxon
"MILLEFIORI" GLASS BEADS
black glass with white inlays, England, 5th ctry A.D.,
ea. 2 cm, 0.8 in,

the pair 75 EUR

Very similar specimens in the London Museum:
T. Murdoch, Treasures and Trinkets - Jewellery in London
(London, 1991), no 470.