This study aims to introduce a green, eco-friendly, fast and cost-effective method to synthesis gold nano-sized particles (Au NPs) from actinomycete strain; Streptomyces sp.U30 (KP109810), isolated from metal containing rock.The biosynthesized gold nanoparticles were formed at lower conditions of pH, mass weight and incubation time (7 hours only).The bio-formed Au NPs were fully characterized with...