Update

added

Ferroplasm: Psionics Handbook (3.0)
This malleable metal holds its shape only in the hands of a psionic being.
When an item forged with ferroplasm is unattended or held by a nonpsionic creature, it melts and temporarily loses all special powers.
But when wielded by, psionic creature, such an item immediately springs back into its true shape and regains all abilities.
In its proper form, a ferroplasm item glows with a violet light (illuminating a 10-foot-radius), unless the item’s owner mentally quenches it.
In an area where psionic powers do not function, it collapses as if in the hands of a nonpsionic creature. ...

Weapons fashioned from ferroplasm have a natural enhancement bonus to attack and damage....
These bonuses do not stack with other enhancement bonuses.
Weapons or armor fashioned from ferroplasm are treated as masterwork items with regard to creation times,
but the masterwork quality does not affect the enhancement bonus of weapons....

Ferroplasm has hardness 20 and 40 hit points per inch of thickness when in its true form, and a hardness of 5 and 10 hit points per inch of thickness when soft.
and

Truesilver: can be added to an existing weapon, and have "No aura (nonmagical)" Ghostwalk

as usual thanks ShurikVch