Are emeralds rarer than diamonds?

I'm curious to know, are emeralds truly more scarce than diamonds? I've heard that diamonds are heavily mined and marketed, but is that the sole reason behind their perceived abundance? Do emeralds possess unique geological qualities that make them harder to uncover, or are there other factors at play here? Is the rarity of a gemstone solely determined by its availability, or are there other characteristics, such as beauty and durability, that also contribute to its perceived value? I'd love to hear your insights on this intriguing question.