An estimated 5.2 million specimens of seed plants, pteridophytes, bryophytes, lichens, myxomycetes and algae (including substantial diatom collections).
An estimated 28 million prepared specimens, including insects and other terrestrial and freshwater arthropods, including spiders, mites and myriapods.
Well over a third of a million individual specimens divided into four main elements: minerals, (about 180,000), rocks, (about 120,000), meteorites (about 5,000) and ores (about 70,000).
Nine million specimens including microfossils, macro-invertebrates, vertebrates and plants.
About 28 million specimens respresent all recent animal groups except insects and arachnids. The collections are housed at South Kensington, Tring and Wandsworth.
Over 790,000 volumes, 112,000 original pieces of arwork, 20,000 photos, 12,000 current serials and geological maps.
The treasures of the Museum's collections are available for loan.