Anumite

Anumite is a fictional mineral used in geology education and in introductory reference works to illustrate how minerals are described and classified. It does not correspond to a documented natural specimen in current mineralogical databases, and its properties are defined for instructional purposes.

Idealized composition and class: The hypothetical formula is Al2SiO5(OH)2, placing anumite among hydrated aluminum silicates in teaching materials. In many illustrations, it is described as colorless to pale green with a vitreous to silky luster, a white streak, and a Mohs hardness around 6.5. The crystal system is presented as orthorhombic, with prismatic to tabular habit, though classroom examples often simplify morphology.

Occurrence and formation: In educational scenarios, anumite is said to form through low-grade regional metamorphism of alumina-rich sediments, often modeled as accompanying minerals such as quartz and chlorite. These descriptions are schematic and not tied to real-world outcrops.

Classification and relations: Anumite is used to demonstrate how mineral scientists assign formula, class, crystal system, and physical properties. It is sometimes discussed alongside real minerals with similar compositions, such as certain aluminum silicates, to illustrate isomorphism and polymorphism concepts.

Uses and limitations: The term remains a didactic device; there are no mineral specimens, mining applications, or industrial uses associated with anumite in real geology. In scholarly writing, it is typically flagged as hypothetical and for instructional use.