Product code: Sterling Silver Marcasite Pierced Earrings with Removable Black retailer Plastic Hoops, Great Sparkle
These earrings retailer have a ton of sparkle from the marcasites! The plastic circles and be removed so the earrings can be worn without them. You could also add your own circles to it.
There is a hallmark on the back of the earrings but I could not identify it.