This brooch has four heart shaped cut glass stones encasing a rhinestone. It forms a shamrock shape. It is set in a vermeil base. The word "vermeil" is a French word which came into use in the English language, mostly in America, in the 19th century silver gilt. vemeil is a mix of metals. This is most probably from the 1940's. It is not marked which makes it harder to identify. What I admire the most is the clarity of the blue glass. It is a petite little pin that has a 1" diameter.