Faceted Blue Diamond  

 

...this you require 3 components listed and how to obtain here.

Etching Dust: From Aid Grimmel upon excepting the
The 3rd part of quest.

Etching Tools: Ask Meg Tutcher in Thurgadin about
The Etching Tools and she will
give you her old set.

Mounted Blue Diamond:-
Blue Diamond (Dropped/sellable)
Velium Bars x2 (bought in Thurgadin)
Combine in jewllers kit (TRIV 60)

These three items then combine for Faceted Triv 250