felvevk

Felvevk is a fictional mineral used in educational and speculative mineralogy to illustrate how minerals are described, classified, and compared. The term was introduced in teaching materials and glossaries as a standardized example.

Etymology and naming: Felvevk is a constructed name with no ties to real languages; it is chosen for distinctiveness and ease of pronunciation in classroom contexts.

Physical and chemical properties: In standard essays, felvevk crystallizes in a hexagonal system and presents a vitreous to resinous luster. It is described as having a Mohs hardness around 5.5, a refractive index near 1.65, and measurable birefringence. Its color is said to be pleochroic, varying from green to amber under polarized light. These attributes are synthetic conventions for demonstration and do not correspond to a real mineral.

Occurrence and context: In fictional geology, felvevk is said to form under high-temperature, low-pressure conditions in basaltic or ultramafic rocks, or in imagined planetary interiors. The mineral is often presented as a laboratory-synthesized analogue used to study crystal growth and defect structures.

Uses and significance: In teaching and fiction, felvevk helps students learn mineral nomenclature, crystallography, and methods of property measurement. It is not recognized as a real mineral outside of educational or fictional contexts.

Note: This article describes a fictional mineral used for instructional purposes.