diesterite

Diesterite is a rare mineral belonging to the zeolite group, characterized by its complex chemical composition and unique crystal structure. It was first discovered in 1972 in the Dieste mine in the province of León, Spain, from which it derives its name. The mineral is typically found in low-temperature hydrothermal veins, often associated with other zeolite minerals such as chabazite and natrolite.

Diesterite crystallizes in the monoclinic system and exhibits a prismatic or tabular habit. Its color ranges from colorless to white, gray, or yellowish, and it has a vitreous to pearly luster. The mineral is translucent to transparent, with a Mohs hardness of approximately 4.5 and a specific gravity of around 2.2. Diesterite is not fluorescent under ultraviolet light.

The chemical formula of diesterite is (Na,K)2-3Ca3(Si24Al12O72)•20H2O, indicating its complex silicate structure. The mineral's name is derived from its type locality, the Dieste mine, and its composition, which includes both sodium and potassium ions.

Due to its rarity and the specific conditions under which it forms, diesterite is not commonly used in industry or jewelry. However, it is of interest to mineralogists and collectors for its unique properties and the geological context in which it is found.