uvalite

Uvalite is a rare mineral belonging to the zeolite group, characterized by its unique crystal structure and composition. It was first discovered in 1970 in the Uval River valley in the Republic of Macedonia, from which it derives its name. Uvalite is typically found in volcanic rocks and hydrothermal deposits, often associated with minerals such as analcime, natrolite, and chabazite.

The mineral is known for its distinctive crystal habit, which includes prismatic crystals and radial aggregates. Uvalite crystals are usually colorless or white, but can also exhibit shades of gray, yellow, or brown due to impurities. Its hardness on the Mohs scale is approximately 5, and it has a specific gravity ranging from 2.2 to 2.3.

Uvalite's chemical formula is Na6Al6Si12O32·12H2O, indicating its composition of sodium, aluminum, silicon, oxygen, and water. This formula reflects its zeolite nature, which involves a three-dimensional framework of silica and alumina with large cavities that can accommodate water molecules and other ions.

Due to its rarity and unique properties, uvalite is of interest to mineral collectors and researchers studying zeolite minerals. Its occurrence is limited to a few locations worldwide, including the type locality in Macedonia and other volcanic regions. Despite its rarity, uvalite's crystal structure and composition make it a valuable subject for scientific study and a prized specimen for collectors.