Trinitite is a historic man-made glass formed during the Trinity test in New Mexico, USA, on 16 July 1945, the world’s first nuclear detonation. The extreme heat and energy released during the explosion fused desert sand and surface material into glass, creating the distinctive material now known as Trinitite. Although it is not meteorite impact glass, it is often collected alongside Impactites, Tektites, and other high-energy natural and artificial glasses because of its formation under extreme conditions.

Specimens of Trinitite are typically pale green to grey-green, with a glassy upper surface and a rougher underside where the material fused with the ground. Some pieces may contain bubbles, flow textures, or small inclusions from the surrounding environment. Its colour and texture can vary depending on composition and formation conditions, but classic green Trinitite remains the most recognised form. Material still at the Trinity site is protected, so collector specimens generally come from older legally held material removed before modern restrictions.

For collectors, Trinitite offers a rare and historically significant addition to collections focused on natural glass, impact-related materials, atomic age history, or high-energy formation processes. Its importance lies not in extraterrestrial origin, but in its direct connection to a clearly documented moment in modern history. Each specimen represents a physical remnant of the beginning of the nuclear age, preserved as glass from one of the most significant scientific events of the 20th century.