Bead Names or are they categories, then descriptions within each category
Resin:
Plastic http://en.wikipedia.org/wiki/Plastic#Types
Phenolic,
Polymer
Clay: http://en.wikipedia.org/wiki/Clay
Porcelain
High Fire
PMC
Metal
Brass
Gold
Silver
Pewter
Nickle
Copper
Tin
Aluminum
Lead
Metalized Plastic

Pumtek
Dzi
Stone http://en.wikipedia.org/wiki/Category:Stone (huge list here)

Pearls:
Cultured
Freshwater

Glass http://en.wikipedia.org/wiki/Category:Glass_types
Effetre Glass
Borosilicate Glass
Lead Crystal
Fire Polish
Moulded
Powder Glass
Cubic Zirconia
Seedbeads
Bugels
Charlottes

Paper
Bone
Horn
Nuts
Seeds