👉 Gastrophilite is a type of mineral in the Earth's crust that contains organic matter. It is often found in volcanic rocks and metamorphic rock formations, where it helps to maintain the structure of these rocks. Gastrophilaites are also known as "acidic" minerals, which means they contain sulfur compounds. They are usually found in areas with high levels of sulfur dioxide emissions or industrial activities that release sulfur dioxide into the air.