Turumudelite

Turumudelite is a mineral belonging to the silicate group, specifically a member of the amphibole supergroup. Its chemical formula is generally described as (Na,Ca)2(Mg,Fe,Al)5Si8O22(OH)2. This formula highlights the variable cation composition within its structure, with sodium, calcium, magnesium, iron, and aluminum all able to substitute for one another to some extent. Turumudelite typically crystallizes in the monoclinic crystal system, forming prismatic or acicular crystals. It is often found in association with other metamorphic minerals. The color of turumudelite can range from dark green to black, depending on the precise ratio of iron and magnesium in its composition. It exhibits a Mohs hardness of approximately 5 to 6, indicating moderate resistance to scratching. The specific gravity of turumudelite is typically in the range of 3.1 to 3.3. This mineral is relatively rare and has been identified in a limited number of geological occurrences worldwide. Its formation is generally associated with medium to high-grade metamorphic conditions, often within schists and gneisses. The name "turumudelite" is derived from the Turumudi deposit in India, where it was first described.