Crafting talismans require a Talisman Toolkit and different materials based on the role:
Tanking talismans (high health) require 10 Water of the appropriate quality. 
DPS talismans (attack) require 10 Fire of the appropriate quality.
Healer talismans (healing) require 10 Dust of the appropriate quality.

The assembly pattern depends on the type of talisman:

Major Talismans

Minor Talismans

For information on upgrading and customizing endgame talismans, see Endgame Gear Guide.