Help to find the item( (Red Dead Redemption 2)

I have 78 collected, and this is not present. Photo is not mine.

And still it remains, what is it?

Perhaps it is a stone arrowhead. To find it if you can find all the dream catchers and solve their secret.

Blood Suslik
The amulet of feather owl it's called, can't remember where they come from.
It is written that is made.
I found:
Pick up location: after the completion of the mission "Archaeology for beginners" without committing murder.
Remember: in the 6th Chapter in the mission with the leader of the Indians have stealth in the military camp to find the Indian relics, and then the leader gives a mascot.

MrGrave
The tip is

DemanShu
Thanks, re-hosted, all tied up, and got the amulet.