Antique Gold store and Emerald Uranium Glass Brooch Mid 19th c.-1920's

It was most likely made in the Czech Republic . I don't know what the base metal is but it is store non-magnetic .The stones are un-foiled so they are called paste stones and measure 1/2'' long or 13mm .They are in near mint condition . The pin is 2 1/8'' long .Uranium glass was only made from the mid 1800's to the 1920's .