The pin measures exactly 2 long and is of some type of plant - it could be wheat, an ear of corn, some kind of flower, etc. All rhinestones are intact and appear to be original as they are all uniform in color and clarity - they are not as clear as they were in the 50s - but they are not dark - they really sparkle when the light hits them!
The rhodium plating on this piece is fantastic - bright and smooth - it looks like platinum! The Trifari name is on the back.