niveliin

Niveliin is a rare silicate mineral described in the scientific literature for its distinctive layered structure and high thermal stability. It was first identified in hydrothermally altered metamorphic rocks in the Niveli Range, after which it was named.

In hand specimens, Niveliin occurs as slender prismatic crystals and massive aggregates. It typically ranges in color from olive-green to brown and has a vitreous to resinous luster. The mineral has a distinctive cleavage along two planes and a Mohs hardness around 6.5; its density is approximately 3.2 g/cm3.

Niveliin forms under high-temperature hydrothermal conditions and is commonly associated with quartz, fluorite, and chlorite. X-ray analysis places it in a monoclinic crystal system, with a layered silicate structure that contributes to its thermal stability.

Deposits are small and widely scattered, making Niveliin a rare mineral. It has been the subject of interest for potential industrial applications, particularly as a ceramic or abrasive material, and for its dielectric properties in research contexts.

Because of its rarity and specialized nature, Niveliin is mainly of scientific interest and is handled as a mineral specimen under standard laboratory safety protocols for mineral dust.