What is mongo db leaf pin and is it a metal pin?

Hey Everyone, Me and my friend got position of runner up in mongo db atlas x-dev hackathon. Mongo db sent us a gift pack containing T-shirt, Leaft Sticker and leaf pin. We don’t know what is left pin. For clearance of the product they are asking for what is this leaf pink and it’s made up of which material.
We don’t know anything. We tried searching but found nothing.
Can anyone help us with this. This pin is made up of which metal.