Seeing as you are Philosophers I thought you would be the ones to ask this
You have probably asked the wrong website, since the 'Philosopher' in 'the Philosopher's Stone' does not refer to a philosopher but to a scientist, or an alchemist. The term 'scientist' was only invented in the 19th century; Newton was a 'Natural Philosopher'. And in fact Newton himself was centrally concerned with the search for the Philosopher's Stone. For Newton put an enormous effort into alchemy, and the Philosopher's Stone is what the alchemists were looking for, a substance that would convert base metals into gold. There is alas no reason to believe this substance exists. Transmutation of elements does occur -- think of radioactivity -- but we've no way to convert lead into gold.