The red-purple coloration is due to the absorption by The larger particles when the inexperienced coloration is attributed to The sunshine scattering by colloidal dispersions of Ag nanoparticles by using a sizing > 40 nm. The Lycurgus cup is regarded as among the list of oldest artificial nanomaterials [1]. An https://www.directivepublications.org/journal-of-applied-nanoscience/