Is muska, meaning a triangular folded thing, a noun or an adjective in Turkish?

I found in dictionary

muska = amulet, charm.

Do you mean this, or it is something else?

Will be interesting to know because in Russian and English it is noun

http://www.tulumba.com/mmTULUMBA/Images/HO186020OR017_250.jpg

Yes, it is a noun. It is the name of that object you see in the picture. Basically it is a paper covered with a protective material such as leather, metal or fabric. It is worn as a necklace (kolye) by both men and women. People believe muska will protect them.

Then it has to be a noun

No - I didn't mean that meaning......

I meant to describe a thing as being folded into a triangle. In English the closest translation I can think of is "folded triangular" which is a pair of adjectives.

"üçgen şeklinde katlanmış" (folded in the form of a triange) is the closest I can think.

example:
Törende, ölen askerin eşine üçgen şeklinde katlanmış bir bayrak verdiler.

In the ceremony they gave the wife of the soldier who died, a flag that was folded as a triangle.
(Corrections on my English sentences by native English speakers, are always welcome. I know my English isn't perfect. "that was folded into a triangle" might be better.)

Example:
Törende, ölen askerin eşine üçgen şeklinde katlanmış bir bayrak verdiler.

During the ceremony they gave the wife(widow) of deceased soldier a flag that was folded into a triangle.