👉 In mathematics, a concretor (also known as a concretion or a calcite) is an irregular, hard, and often black mineral that forms in rock. It is composed of calcium carbonate, which can be found in various minerals such as calcite, dolomite, and feldspar.
Concretors are formed when the weathering of rocks causes the formation of new layers on top of existing ones. The process involves several steps:
1.
Formation
: Concretors form