Found at civil war camp. Need help with ID.

[JimK]

We found this today at the civil war camp that we get to hunt occasionally. Can anyone tell me if this is period and what it is exactly? The back has two tabs/prongs, not a shank like a button.
Thanks in advance!

 

[relic nut]

Possibly a Bridal Rosette.
Nice find

 

[A2coins]

Agreed cool find