Loam is considered the "ideal" soil type for many plants because it has a balanced mix of:

* Sand: Provides good drainage and aeration.

* Silt: Holds onto moisture and nutrients better than sand.

* Clay: Provides structure and retains nutrients.

The "all sorts of different minerals" part is also accurate. Soil is formed from the breakdown of rocks, and those rocks contain various minerals. These minerals are essential for plant growth, providing nutrients like nitrogen, phosphorus, and potassium.

So, to answer your question directly: Loam soil has a medium texture and is made of a variety of different minerals.