👉 Biforine is a rare mineral that is found in the earth's crust. It is composed of two different elements, cobalt and iron oxide, which are both metallic elements. The name "biforine" comes from the fact that it has two different chemical formulas. One formula, B20O7, represents the compound as a solid or powder, while the other formula, B24O12, is more commonly used to represent the compound as a liquid.