Mineral deposit, in various forms and industrial uses, is economic if profitable on investment. Principal ore minerals, formulas, percent content and major uses are listed. Understanding of deposit type facilitates to formulate appropriate and effective exploration program from grassroot to mining. Deposits are classified, based on multiple criteria like geographic localization, occurrence depth, host rock relation, structural control, mineralization nature, morphology, genetic features and contained metals. Deposit-class description is perceivable, comparable and acceptable. Deposits are integral part of host rock formed at definite time and space. Orebody is concentration of mineral(s) or metal(s) and techno-economically exploitable. Ore minerals have affinity to host rocks, associated elements and deposit type. Adequate knowledge of favorable stratigraphy, structure and host rock of the region is necessary to design exploration program. Attention is focused on layered mafic-ultramafic rocks for searching PGE. Proterozoic carbonate-black schist environment is preferred target for sedimentary exhalative sulfide ore. Mineral sectors work on standard industrial specifications for salable market-finish commodity.