The event horizon of a supermassive black hole represents a boundary in the space-time continuum. Everything located behind it, is not perceptible from outside. Some cosmological models suggest the universe itself is enclosed by an event horizon. Fascinating! The Black Hole Bangle is embellished with a natural black opal. Its range of colours is diverse; almost all known colours are reflected in it. With all the light that a black hole is sucking up, I find the idea very charming that it could be just as colourful inside the black hole. The bracelet is decorated with a monumental inscription, in which one should slip into: "The Event Horizon of a Supermassive Black Hole".