👉 Tephrite is a type of mineral that occurs in certain rocks and soil. It is often associated with volcanic activity, such as during periods of tectonic uplift or during eruptions by volcanoes. Tephrites are known for their distinctive white coloration due to the presence of iron oxide crystals within them. They are typically found at depths of about 10-35 meters and can be found in various types of rocks and soil, including igneous, sedimentary, and metam