karvevn

Karvevn is a fictional mineral introduced in speculative geology and worldbuilding to illustrate mineralogical and metamorphic concepts. The name combines a fictional toponym karve with the -vn suffix commonly used in mineral nomenclature to suggest a silicate-like phase.

Definition and composition: Karvevn is described as a lamellar silicate with a layered crystal framework that yields notable birefringence and iridescence in thin sections. In published worldbuilding lore it is treated as a solid-solution member of two end-members, with trace elements shifting color and optical properties.

Occurrence and formation: In the fictional setting, karvevn forms under high-pressure, low-temperature metamorphism in subduction-like environments within carbonate-silicate rocks. It is typically reported with assemblages that include garnet, chlorite, phengite, and other metamorphic minerals, and its stability is depicted as sensitive to temperature and fluid fugacity.

Physical and optical properties: Karvevn crystals are described as prismatic to tabular, commonly color-transient from pale blue-green to violet, with a vitreous to resinous luster. Mohs hardness is placed around 6–7. Refractive indices are high, and birefringence is strong. Cleavage is described as perfect along one direction and poor in others.

Uses and significance: In education and worldbuilding, karvevn is used to explain phase relations, crystal chemistry, and metamorphic textures, and in fiction it serves as a decorative gem, an energy mediator, or a symbolic material within cultural artifacts.

Discovery and literature: Karvevn is part of fictional or hypothetical mineral catalogues and is attributed to a fictional discoverer in a hypothetical journal, used to seed discussions about mineral stability and texture.