Answer briefly:

How do minerals occur in the Earth?

Minerals are generally found in the rocks or deeply embedded in the earth. They can be found in the cracks, faults or joints. Sometimes they are found as horizontal deposits in the rock strata. Certain minerals like gold and tin are found along with the alluvial deposits.

The smaller occurrence is called veins, and the larger occurrence are called lodes.

Ocean water also contains a large number of minerals like common salt, magnesium, and bromine.