Vintage Ladies Brooch 18kt Yellow Gold. ¬† For sale is a beautiful vintage 18kt yellow gold ladies brooch in the shape of a dragon. The circle pin measures 1″ in diameter and has a non-gold white metal pin, hinge and gold “C” clasp to secure it. The brooch contains one round faux half-pearl, it has been die-cast and assembled. This beautiful brooch comes with an insurance appraisal of $346.00. Note: several lead solders are black in appearance.