Some people say opals photograph best in water- but this 2.47-carat pear-shaped Welo opal practically glows in the dark. A Big Oh Bijoux bespoke piece, I have set it on a vintage 18k chain measuring 2.45mm wide and 18” inches long. Finished with a bezel set diamond, it weighs 10 grams in total. The perfect piece for any opal lover or October baby.