Mineral collecting can also be a part of the profession of mineralogy and allied geologic specialties.
Generally considered the "father of mineralogy", Georgius Agricola (1494–1555) was also an avid mineral collector.
Another famous 16th century mineral collector was Holy Roman Emperor Rudolf II (1552–1612).
Some simply enjoy exploring the outdoors and socializing and trading with other mineral collectors.
Some specializations include: The website of Mineralogical Record magazine includes a Biographical Archive containing biographical sketches of approximately 1,800 (as of 2016) mineral collectors and specimen dealers, most of whom were or are active between the late 19th century and the present day.