Keryth

Keryth is a fictional mineral that appears in science fiction and fantasy literature, as well as in some video games and tabletop role-playing settings. It is typically portrayed as a luminescent crystalline resource valued for energy storage, reaction catalysis, or magical properties.

In most depictions, Keryth forms in hydrothermal or magmatic environments or in extraterrestrial regolith. It is described as having a glassy to prismatic structure, often changing color under different lighting, and possessing high resilience. Many authors assign Keryth the ability to absorb, store, or release energy when stimulated by heat, electricity, or psionic influence.

Uses range from a primary power source for starships or arcane devices to a focal component in spells or enchantments. In science-fiction settings, it may enable advanced propulsion or shield systems; in fantasy settings, it serves as a catalyst for rituals or a source of divine power. Scarcity and control over Keryth frequently drive plot lines and trade networks.

Etymology of the name Keryth varies by work. It is a construct used by multiple authors and game designers rather than a real mineral, with no single canonical origin. The term appears across diverse media and is often treated as a rare, highly influential resource.