It took me a second to realize that the copper used in this ring by Lauren Adriana was likely the actual blue “bowl” (or caldera of its name). The other elements are gold, zircon and diamonds.

Based in London by appointment only, her “about” page notes, “Established in London, Lauren Adriana creates a limited output of unique jewels. She graduated from renowned art college, Central Saint Martins with a BA in Jewellery Design, before founding the business with her partner Nicholas Briggs. Her singular aesthetic and remarkable designs are instantly recognisable, and have earned Lauren Adriana a prodigious reputation and a loyal clientele.”

The location is by appointment only and prices, presumably, are by request.