A beautifully detailed antique split ring in 9ct gold cased / rolled gold.
 
These, like dog clips, are such hard working items; use them to connect chains and bracelets, to hang charms from and as extenders. It'll never just be hanging around in your jewellery box!
 
Gold cased jewelry is a long-lasting form of gold plating and is more durable than modern gold plated jewellery. The gold and base metal are soldered together, then rolled out into a thin sheet. The gold layer is thicker than electroplated gold, so it will last longer (this one has been going for over 100 years) before the base metal shows. 
 
*any chains or pendants shown in the photos are for styling purposes only