A brooch? Silver.

[worldtalker]

Checked out a private yard,39 Merc. and this thing,back side has initials RCo. GodBless Chris

 

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[vpnavy]

Nice finds worldtalker! Don't know about the brooch...

 

[MUD(S.W.A.T)]

Whatever it is, its looking kinda old....
Cool finds !!
Keep @ it and HH !!

 

[Argentium]

Looks like it may be brass

 

[John Boy]

Congrats on the merc.That broach is cool and unique find.thanks for sharing.

 

[hamiddetecting]

Nice one

 

[Alleycat]

could it be a dress clip? they are often that shape :-) great finds!

p.s is that a date on the back?