perustalvia

Perustalvia is a fictional mineral term created for use in educational and encyclopedic exercises to illustrate how minerals are described in a neutral, wiki-style format. It is not a real mineral and is not recognized by major mineralogical databases.

Occurrence and discovery

In the fictional account, perustalvia is described as forming in hydrothermal veins within basaltic rocks of arid highland regions. It is said to crystallize at moderate depths where silica-rich fluids interact with aluminum-bearing rock, producing discrete crystals that can be embedded in host minerals or occur as vein fills.

Properties

Perustalvia is described as a silicate mineral with a vitreous to pearly luster and a blue-green to gray color. The reported hardness is about 5.5 to 6 on the Mohs scale. It is said to have imperfect cleavage in two directions and a pale gray streak. The mineral is described as relatively brittle and prone to alteration when exposed to surface weathering conditions.

Classification and nomenclature

Within the fictional framework, perustalvia is placed among aluminosilicate-like minerals but is explicitly stated to be a construct for demonstration rather than a real classification. The name is presented as a neologism designed to reflect common patterns in mineral naming, rather than as an officially approved term.

Uses and significance

In the fictional material, perustalvia is depicted as a decorative stone or a subject of academic exercises in mineralogy. It serves primarily to illustrate the structure of a concise mineral entry, including occurrence, properties, and classification.