Kloriitti
Kloriitti is a mineral belonging to the chlorite group, which are phyllosilicate minerals. These minerals are common in metamorphic rocks and are also found in some igneous and sedimentary environments. Kloriitti typically has a green color, ranging from pale to dark, though it can also appear brown or black. Its specific gravity is relatively low, and it has a perfect cleavage in one direction, meaning it can be easily split into thin sheets. The chemical composition of kloriitti is complex, generally involving iron, magnesium, aluminum, and silicon, along with oxygen and hydroxyl groups. The exact composition varies, leading to different species within the kloriitti group, such as clinochlore and chamosite. Kloriitti forms under a range of temperatures and pressures, often associated with hydrothermal alteration. It is generally a soft mineral, with a Mohs hardness typically between 2 and 3. While not as economically important as some other minerals, kloriitti can be an indicator of metamorphic conditions and is sometimes found in association with valuable ore deposits.