Delftia acidovorans is a Gram-negative nonspore-forming,[2] aerobe,[3] rod-shaped bacterium known for its ability, together with another bacterium species, Cupriavidus metallidurans, to produce gold nuggets. Layers of these bacteria dissolve gold into nanoparticles. These nanoparticles are able to move through rocks and soil and can be deposited in new locations in gold ore.[4] [5] [6]