This is what my friend Karen had to say:

"amber and resin beads from old 'chapelets'

sizes Kiffa beads varying:
in hight from 3 to 7 mm and width from 5 to 9 mm
total length necklace: 80 cm, containing 31 kiffa beads

lapiz, amber, resin, Kiffa beads and hammered gold beads (Mauritania)
assembled in 1999 in Nouakchott

during my 7 year long stay I never had the chance to stumble upon smaller beads than those in this necklace....."

She wonders where you could find such extra small kiffa beads and would love to see pictures.

By the way, she even named her cat Kiffa.