Silver Dragon Scale

A Silver Dragon Scale can be made by Cespenar with a Silver Dragon Scales and 5000 gold.

Two silver dragons are found in Lumia during Dorn's companion quest. Another silver dragon, Adalon, is found before, in the Underdark, but even if you kill her you do not get any scales.

Since silver dragons are good creatures good characters cannot wear them, and wearer will suffer a -2 malus to charisma.

Description
"This armor, forged from the scales of a silver dragon, is a dead giveaway of wrongdoing on the part of the wearer. While the protection it offers is impressive, one cannot ignore the fact that a creature of incredibile grace and beauty had to be destroyed in order for this armor to be made."