These are delightful.  There are 3 cabachons which can be worn all together or just the one or two.  Very versatile.  Each has been filled with swarf which had been produced in the making of the Aston Martin Valkyrie track cars.  A fabulous combination of silver, brass and bronze metals.  A very decorative piece which is set on a fully adjustable, black leather strap.  Great for any occasion and what a talking point!