Barrel
So-called because of its resemblance to a wine barrel or beer barrel, these oval shaped beads are generally flat on the ends. They ca n also be slightly more cylindrical and still be called a barrel.
Bicone
A bicone is essentially two cone shapes joined at the base. Bicones can be long or short, smooth or faceted. When a bicone is long it is often called a diamond.
Bone
A bone is also called bamboo or hourglass and the hole is