Beads prized in Borneo for their rarity and "power."

Here's some in a former thread, demonstrating the similarity between those traded to Africa and those traded to Borneo:

http://beadcollector.net/cgi-bin/anyboard.cgi?fvp=/openforum/&cmd=iYz&aK=59332&iZz=59332&gV=0&kQz=&aO=1&iWz=0

And, or course, you can Google "lukut sekala" and find all sorts of information and misinformation...