Which two of Plato's elements are actually mixtures?

In Plato's theory of elements, earth and water are considered to be mixtures of his four elements. Earth is a combination of earth and water, while water is a combination of water and air. These mixtures are seen as intermediate states between the pure elemental forms, representing a blending of qualities from the primary elements. Plato believed that these mixtures played a crucial role in the physical world and the composition of all material substances.