Masai - Lamu is an island off the north coast of Kenya, its an old Swahili trading station, very muslim, and the Masai dont naturally belong there, they only come for the tourists. Love the beadwork though.
This photo by Flickr user (Dogan56) entitled Ragazza Fulani, Nigeria is one of the few pictures that I have found that shows so beautifully an example of old Venetian 'Agate' glass beads from the African Trade. Venetians made these large glass beads to trade with the Yoruba. They're milky white, semi-translucent with veins & look like stone. If by chance they were stone, they would be white Indian Agate beads, which would also have come to Africa through the trade routes.