This article analyzes data on the diversity of shapes and sizes of nanoparticles obtained by green synthesis from HAuCl4, AgNO3, Na2SeO3, and Na2SiO3 by using xylotrophic and humus basidiomycetes and soil bacteria. The formation of nanoparticles of various shapes and sizes was controlled by changing the bioreduction conditions, including culture type and age, growth medium, culture liquid, mycelial extract, isolated proteins, and incubation time. Biogenic selenium nanoparticles were represented exclusively by spheres whose size varied from 20 to 550 nm, depending on the culture. Autoclaving of selenium nanoparticles fabricated with bacterial cultures yielded nanowires with a width of 20-150 nm and a length of more than 10 mu m. With bacterial culture liquids, silicon nanospheres were synthesized, ranging in size from very small (5-15 nm) to relatively large (250 nm) particles. The use of the Agaricus culture liquid made it possible to obtain mesoporous particles with a size of 30-60 nm. The size and shape of the fabricated gold and silver nanoparticles were very diverse, depending on the bioreduction conditions, and were represented by regular and irregular spheres; large balls; hexagonal, tetragonal, and triangular prisms; tetrahedrons; and nanobelts. The particle size ranged from 1-10 to 200-500 nm.