by Gelogia Team | Jun 13, 2026 | Mineralogy
Sillimanite is an aluminum silicate mineral that forms under high-temperature metamorphic conditions. It is one of the three important aluminum silicate polymorphs, alongside kyanite and andalusite, and serves as a key indicator mineral for determining metamorphic...
by Gelogia Team | Jun 13, 2026 | Mineralogy
Andalusite is an aluminum silicate mineral commonly found in metamorphic rocks formed under relatively low-pressure conditions. It is one of the three famous aluminum silicate polymorphs, alongside kyanite and sillimanite. Andalusite is particularly valued because it...
by Gelogia Team | Jun 13, 2026 | Mineralogy
Kyanite is a distinctive blue aluminum silicate mineral commonly found in metamorphic rocks. It is especially important because it forms under high-pressure metamorphic conditions and helps geologists reconstruct the temperature and pressure history of rocks. Kyanite...
by Gelogia Team | Jun 13, 2026 | Mineralogy
Serpentine is a group of green hydrated magnesium silicate minerals commonly formed by the alteration of ultramafic rocks such as peridotite and dunite. These minerals are important indicators of hydrothermal activity and play a major role in the transformation of...
by Gelogia Team | Jun 13, 2026 | Mineralogy
Chlorite is a common green mineral group belonging to the phyllosilicate (sheet silicate) family. It is especially abundant in metamorphic rocks and forms during the alteration of other ferromagnesian minerals such as biotite, pyroxene, amphibole, and garnet. Chlorite...
by Gelogia Team | Jun 12, 2026 | Mineralogy
Augite is one of the most common minerals in the pyroxene group and an important rock-forming mineral in igneous and metamorphic rocks. It is typically dark green, dark brown, or black and is especially abundant in basalt, gabbro, and other mafic rocks. Because augite...
