Because of the impact of their greater surface area and smaller quantum sizes compared to bulk metal or other metal atoms, metal nanoparticles, such as those formed of gold, exhibit a number of unusual chemical and physical properties. The qualities that depend on size and shapeof gold nanoparticles (GNPs) are particularly notable. Metal nanoparticles have received a lot of notice because of their distinct qualities and exciting prospective uses in biological sensing, electronics, photonics, and imaging. The latest developments in GNP synthesis are discussed in this review.Green chemistry measures were used to assess the production of gold nanoparticles, with a focus on Process Mass Intensity (PMI). Based on these measurements, opportunities for improving synthetic approaches were found. With PMIs that were often in the thousands, solvent usage was found to be the main obstacle for nanoparticle synthesis, even ones that were otherwise considered to be environmentally friendly. Since ligated metal nanoparticles are the most industrially relevant, but least environmentally friendly, their synthesis by arrested precipitation was chosen as the best chance for significant advances. Gold nanoparticles of small sizes and bio-stability are produced biochemically, and they are used in many biological applications.