Zengalmi
From elanthipedia
There is no real world material bearing the name zengalmi.
Items containing this material may cast the Gar Zeng spell.
Alteration Properties
This stone has a pale blue color and has a polished sheen, with bands of silvery white running through it.
It is an uncommon material that must be provided for alterations. Intricate detailing via carving is not possible though engraving is fine.