Complex sentence: The Mineralogical and Geological Museum at Harvard (Harvard Mineralogical Museum being the accepted short form of the name) is located on the grounds of Harvard University in Cambridge, Massachusetts and is one of three museums which collectively comprise the Harvard Museum of Natural History.
Split into simpler sentences: The Mineralogical and Geological Museum at Harvard, or the Harvard Mineralogical Museum short form of the name, is located on the campus of Harvard University in Cambridge, Massachusetts. Harvard's natural history museum for mineralogy and geology is one of the three research museums which collectively comprise the Harvard Museum of Natural History.