Silver Penguin Stone Belly Brooch PinWhat a charming little fellow this is! Made of Silver, this penguin brooch features a large pale green stone belly and a sturdy pin in back. I cannot tell for certain what the stone is but I would guess that it is Agate. This brooch is on very good condition. As you can see in the pics, it does have some oxidation tarnish but I have not taken too much of it off as I believe it adds character to old silver pieces like this. The length is 2. 25" and 1.