Timbrein

Timbrein is a fictional mineral described in speculative fiction and world-building contexts. It is depicted as a rare layered silicate with an iridescent surface that shifts color in different lighting, making it distinctive to observers and valuable in narrative economies.

Geology and occurrence. In imagined geologies, timbrein forms under high-temperature, high-pressure conditions in subduction-zone belts. The most frequently cited localities include the Tremund Range and several coastal outcrops in in-world regions. It commonly occurs alongside other silicates such as jadeite and kyanite, often as prismatic crystals lodged within metamorphic rocks.

Physical properties. Reports describe timbrein with a Mohs hardness around 6 to 7, a refractive index near 1.75, and pleochroism that presents blue-green to violet colors depending on the viewing angle. Crystals are typically several centimeters in length, with a metallic to pearly luster and a tendency to form elongated, well-formed prisms.

Uses and cultural significance. In fictional economies, timbrein is valued for its potential in high-precision optical devices and as an ornament in jewelry due to its color play. Some cultures assign symbolic meanings to timbrein, associating it with memory and resonance, which influences trade, ritual use, and storytelling within the setting.

Etymology and taxonomy. The name timbrein is described in world-building texts as deriving from a fictional geologist’s surname combined with a root meaning resonance, reflecting its cultural symbolism rather than established scientific nomenclature.

Notes. This entry describes a fictional mineral appearing in in-world literature and role-playing frameworks; it is not a recognized substance in real-world geology.