Bead Names or are they categories, then descriptions within each category

Plastic: http://en.wikipedia.org/wiki/Plastic#Types
Phenolic
Resin
Acrylic

Clay: http://en.wikipedia.org/wiki/Clay
Porcelain
High Fire
Raku
Polymer (this may be better under plastic?)
PMC

Metal : http://en.wikipedia.org/wiki/Metal
Brass
Gold
Silver
Pewter
Nickle
Copper
Tin
Aluminum
Lead
Metalized Plastic
Steel

Stone: http://en.wikipedia.org/wiki/Category:Stone (huge list here)
Fossil
Semi-Precious
Precious

Pearls:
Cultured
Freshwater

Glass http://en.wikipedia.org/wiki/Category:Glass_types
Effetre Glass
Borosilicate Glass
Lead Crystal
Fire Polish
Powder Glass
Cubic Zirconia
GoldStone
Fiber-Optic
Uranium

Paper
Bone
Horn
Shell
Teeth
Nuts
Seeds: http://en.wikipedia.org/wiki/Seed

Distinctions included in above main categories

Methods:
Moulded
Drawn
Wound
Feather
Trail
Filigrano
Blown
Lampwork
Lost-wax
Carved
Cabochon
Pressed

Common names
Seedbeads
Bugels
Charlottes
Rocaille
Rosetta
Chevron
Druk
Pumtek
dZi, gZi
Hebron
Vaseline
Russian Blue
Millefiori

I have this in a word file if anyone wants to add to it.