Rare Antique Victorian Sterling Silver Oval Cabouchon Moonstone Stud Earrings. Each earring has an oval cabouchon moonstone measuring 11mm by 10mm in a openback sterling silver mount. The moonstones have a lovely opaque slightly blue colour. The earrings are fastened by a back which screws onto the post. They are not marked as is often the case for jewellery of this era but they have been tested positive for silver.