Unsigned Sterling Silver Marcasite Penguin Pin AS IS One Missing Hard too Notice Stone Black Onyx Garnet ? Eye Fine Jewelry

This is a dandy onyx and marcasite penguin pin, but it has one missing marcasite near the bottom. It appears to be sterling silver and polishes like sterling, but there aren't any maker marks or numbers that I can find. It looks there is a section on the back on the side of the pin shaft where the manufacturer stamp would be as there is a stamp indent, but again, it just doesn't show any letters or numbers.

The black sections are inlay onyx, not enamel. It measures a little over 1 3/4" long. Weighs 7.5 grams. Not a vintage pin.

The tiny eye is either a garnet or ruby. The missing marcasite stone is hard to notice. Please view all photos. Sold as is and all sales are final and it is marked accordingly.