This is a Brooch or pin it is made of sterling silver or 925 which is the same as sterling. This one is a Leaf ,I have not cleaned this item I did not want to destroy the vintage patina
3" x 2 1/2" and weighs aprox. over 2 and a half grams. it is marked on back Sterling there are no other markings, I am not sure of actual date this item was made.