black buds?

I recently purchased a quarter of this veryy strange type of bud.
it's like almost black/blackish...
i'm used to smoking hydro and when i came across this i didn't know what to think..
it smells HORRIBLE...like it was grown in cow shit or something...
it's nothing amazing or anything...just completely curious

photo included.

Chocolate chunk? I grew some..it didnt smell like cowshit..but kinda like hay/grass

this is like a year old..my bad hahahaha

Looks like cow shit too. When I lived in Kansas there was lots of weed like this going around. So glad to live in Colorado now. How is the smoke? It looks like schwag in buds. Haha

It`s the way it was cured.You probably smell ammonia to.Good dope just not cured right!!

could be mold