👉 Ganophyllite is a type of igneous rock that forms from the cooling and solidification of organic materials, such as fungi. It is composed primarily of biogenic silica and quartz, with small amounts of other minerals such as calcite, feldspar, and amphibole. The mineralogy of ganophyllite can vary greatly depending on the type of organic material it contains. Ganophyllites are often found in sedimentary rock formations, including those associated with volcanic activity