Jewelcrafting

Jewelry, both exotic and mundane, are created by Crafters using the
Craft (Jewelry) skill.  Jewelcrafting is a complex process, and it
is advised that there be someone around that can enchant the
materials before you start, if you desire special effects.  It can
be done afterwards, but it's a more tedius process.

Enchanting can be done by anybody who can cast magic.  More powerful
metals require higher caster levels.

Listed below are some of the more commonly known gems and materials
used to craft the jewelry they are set in.  All jewelry uses 1
'chunk' of a particular kind of metal.

The DC to make a piece of jewelry is 15 + bonus x 3.

The cost for materials is bonus squared x 1500.

Gems

Smoky Quartz - Deflection Bonus to AC
Blended Quartz - DR boost
Pearl - Elemental Resistance - type based on color
Pyrite - Damage
Opal - Accuracy
Saphire - Command Slots
Ruby - Hit Points
Diamond - Strength
Turquoise - Dexterity
Garnet - Constitution
Emerald - Intellegence
Bloodstone - Wisdom
Topaz - Charisma

Metals

Copper -> Silver -> Gold -> Electrum -> Platinum -> Mythril ->
  .5   ->   1    ->  2   ->    3     ->     4    ->    5    ->