But many experts would say that this rather small piece of rock was more valuable than any of the larger objects in the room

In this line of text the author makes his viewpoint clear about the

Reign of pharaoh amenophis lll who discovered the Rosetta Stone
Reign of pharaoh amenophis ll who discovered the Rosetta Stone
Rosetta Stones use of hieroglyphs to describe life in ancient Egypt
Rosetta Stones use of hieroglyphs to explain weather patterns