Klorofyllit

Klorofyllit is a rare mineral composed of magnesium, aluminum, iron, and silicon. Its chemical formula is approximately Mg3Al2(Si3Al)O10(OH)2. Klorofyllit is a member of the chlorite group of minerals, known for their layered silicate structure. It typically forms in metamorphic rocks, often associated with mafic and ultramafic rocks that have undergone low-grade metamorphism. The mineral is characterized by its greenish color, which is a common trait among chlorite minerals due to the presence of iron. Klorofyllit can occur as platy or micaceous aggregates. Its physical properties include a relatively soft hardness, typically around 2 to 3 on the Mohs scale, and a specific gravity of approximately 2.7 to 2.8. Optical microscopy reveals it as transparent to translucent with a greasy luster. It is found in limited localities worldwide, often in association with other metamorphic minerals. The name "klorofyllit" is derived from the Greek word "chloros," meaning green, referring to its characteristic color.