If someone were to describe The Rosetta Stone to a friend he or she would most likely compare it to?

If someone were to describe The Rosetta Stone to a friend, they might compare it to a key that unlocks the secrets of ancient languages. They could also liken it to a multilingual signpost, showcasing the same message in three different scripts. This iconic artifact represents a crucial breakthrough in understanding Egyptian hieroglyphs, much like a translator bridging communication gaps between cultures.