👉 Nelsonite is a mineral that forms in the Earth's crust and is named after its distinctive color. It is composed of quartz, feldspar, and nepheline telluride (nitrate) minerals. The chemical formula for Nelsonite is Na2F2•3SiO2, where F represents fluorine, S represents silicon, and O represents oxygen. This mineral has a lusterless, white to yellowish-white color that can vary depending on the specific variety of Nelson