I want to share this information co those who still do not know how to make their own crystales for strengthening arms and armor.
It is a very simple process, the necessary ingredients are purchased on a npc, ested need to buy regular items, I always prefer to do it with daggas, for example:
Normal wepons need: Kriss Shining, Onyx Eye Stiletto, Silent Kriss, Flame Dirk
to create rare wepons, need: Faira's Kriss, Embla's Dirk
for unique wepon: Lewis' Maingauche
Now above contact Craft Studio and find a mill near the treasury, position there the unique objects and you get crystales grade A.
Lewis' Maingauche Grade A
Kish's Kriss Grade B
Armenes's Dagger Grade C
Spirit of Ferdinant Grade D
Dirk of Rev'Deca Grade F