The event horizon of a supermassive black hole represents an interface in the space-time continuum. Everything behind it is imperceptible from outside. Some cosmological models assume that the universe itself is enclosed by an event horizon. Fascinating! The Black Hole bangle features a natural black opal. Its color play is diverse, because almost all known colors are reflected in it. With all the light that a black hole sucks in, I find the idea that it could be just as colorful inside very charming. The bangle features monumental writing to slip into: The Event Horizon of a Supermassive Black Hole.