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Vintage Filigree Brooch

 
This brooch is as shown in the photos.
 
I don't know what the centre is made of. Maybe glass, maybe plastic.
 
The clasp is as shown. It would need some modification if you wanted to wear it (maybe a safety chain to stop it from falling off if it unclasps)
 
The filigree is metal. I don't know what type.
 
It measures 5.1cm x 2.6cm.