I'd say you're right, it's more than hard to believe, that's why I keep my words short to avoid seeming ridiculous or crazy. On the other hand I'm looking for those with vision and they surely don't need getting blinded by fireworks in order to see the spark. Though I admit I'm saying to little what else should I say without starting a thousands word 'preaching'? As you expected getting amused in the first place, let me tell your expectations are low... it's hilarious. Because this substance is found only in fairy tales, so for grownups it's crazy by default. And Harry Potter is a fool, that's how most alchemists are. Would diamonds be a legend if no one has one?
So here's a clue to make the philosopher's stone: "tears of gold"