This is a Sterling silver pendant, which is made with two loops through which you file the chain, so that it looks more like a necklace. It is set with a Coober Pedy opal which shows a very nice display of green, yellow and pink pin-prick fire. The stone is oval and is 1.5cm long and 7mm wide at its widest point. The entire pendant is 4.4cm high and 3.3cm wide. The back is hallmarked for Edinburgh 2017. It is a rather decorative piece with an unusual and attractive shape.