This is a Celtic knot pendant, made of Sterling silver and set with an Australian opal from the Coober Pedy mines. It was originally set with a black onyx and was not hallmarked. I removed the stone, replaced it with an opal and had the pendant hallmarked for Edinburgh 2018. The stone is 1.4cm long and 8mm wide. It has a cream-coloured background with flashes of blue and red. The entire pendant is 3.1cm long. It comes with an 18” Sterling silver snake chain and will be gift-boxed.