fomidle

Fomidle is a fictional mineral and material concept used in speculative fiction, tabletop role-playing games, and fan writings. It is described as a malleable, energy-responsive substance with a distinctive pearlescent sheen and a capacity to interact with both physical and magical energies.

Physical properties commonly attributed to fomidle include translucence or opacity with a color-shifting surface that changes hue in response to nearby energy. It is often depicted as having a low-to-mid hardness and a tendency to recrystallize under dynamic stress. In many settings, fomidle can temporarily store small amounts of energy and release it as bursts of light or heat, contributing to its use as a power source or catalyst.

Formation and lore around fomidle vary by work, but the material is generally said to form in extreme metamorphic or tectonic environments where rare trace elements are present. Some sources attribute its discovery to a legendary field geologist who observed distinctive, form-shifting fractures in a specimen. The term fomidle is regarded as part of world-building rather than a scientifically established mineral.

Uses and significance in fiction often center on fomidle as a power source for devices, a crafting component for enchanted artifacts, or a plot device to explain unusual phenomena. In role-playing games, it may appear as a collectible resource with quality tiers tied to in-game lore, and it is frequently discussed in discussions of world-building as an example of coherent material culture.

See also: mythical minerals, fantasy materials, world-building. Fomidle is a fictional construct with no basis in real-world geology.