Lower Quality? Lacking in complex feature? authenticity? what is considered authentic? If i tell you water is authentic if it's made from 2 hydrogen atoms and 1

Lower Quality? Lacking in complex feature? authenticity? what is considered authentic? If i tell you water is authentic if it's made from 2 hydrogen atoms and 1 oxygen atom, in the same way that diamond is made from compressed carbon and whether synthetic or dug from the ground. when the chemical construct is the same what determines it as not being authentic and lower quality? In fact synthetic diamonds offer higher clarity than natural ones depending on which one you choose, they have visually perfect ones in the same way natural diamonds do. So where is this "lower quality" coming from?