On a recent field visit to Eastern Region, Ghana, I chanced upon a couple of families that made beads.
The woman was pounding glass bottles (I had no idea before I saw this that beads were crushed glass), while the man put the crushed glass into the cast and into the mud oven. Once baked, they were painted, sometimes polished a bit and transform into beautiful colourful beads. Of course the only un-surprising fact was that what they sold me for 3 cedis would cost nothing less than 15 in Accra.
(Pic – borrowed from http://www.africanbeads.org/what-are-krobo-beads/)