You can fix this brooch beret with paste on your workpiece, or solder.
Use the paste with less binder for this and not a remnant of silver clay because it could go loose due to shrinkage.
Attention: Do not fire higher than 750 ° C because of brittle becoming silver.
Black silver can be made beautiful again by means of a safe acid bath.
Immediately after firing quensh in cold water, it is best for the hardness of the pin and garnish, but this can not be done if stones are put in it.