1. Dolomite: Dolomite is a carbonate mineral that is chemically similar to limestone, but with magnesium replacing some of the calcium. It often forms in similar environments as limestone.
2. Chalk: Chalk is a type of limestone made up of the fossilized remains of microscopic marine organisms called coccolithophores. It has a high calcium carbonate content and is often white and porous.
While both dolomite and chalk share similarities in composition with limestone, they have distinct characteristics that differentiate them.
