Question

Next to the statues and the head, the slab seems unimpressive at first glance. It is roughly the size of a tabletop-three feet nine inches long, two feet four and a half inches wide, and eleven inches thick. But many experts would say that this rather small piece of rock was more valuable than any of the larger objects in the room. For it is the famed Rosetta Stone, which gave nineteenth-century scholars their first key to the secrets of ancient Egypt.

—The Riddle of the Rosetta Stone,
James Cross Giblin

Which statement is an opinion?

It is roughly the size of a tabletop . . .
[T]his rather small piece of rock was more valuable than any of the larger objects in the room.
Next to the statues and the head
three feet nine inches long, two feet four and a half inches wide, and eleven inches thick.

Answer 1

The statement that is an opinion is: "[T]his rather small piece of rock was more valuable than any of the larger objects in the room." This is a value judgment about the significance of the Rosetta Stone compared to other objects, which is subjective and can vary based on individual perspectives. The other statements provide factual information about the size and location of the stone.