Myth shakes his head even before the griffon finishes his questions. "There was no indication as to where the others are, Copper Feather, simply that they are well-hidden and somewhere in Equestria. As for their appearances..." He grimaces. "The one hidden in the mountain is a sapphire, but there was no mention as to size, shape, recognizability, or precise location within. The others I can only guess at. We'll have to test every sapphire we find in there manually."