Fable 2 Archaeologist Quest Need Help?

My friend and I are stuck in a rather annoying predicament. There is a quest for the Archaeologist to find an artifact, we’ve found all the other treasures and such but this one eludes us. The note reads as follows “I haven’t been able to gather many clues on this next artifact. I believe its in a cave by a beach somewhere, probably not far from the region where one of the previous artifacts was found. Which one, though, I cannot tell.” If you know where it is please tell me i would very much appreciate it.
The last one is in reavers escape place ifn u be wanting to know

A few people have said how to get there, but let me put it simply.THIS IS THE EASIEST WAY TO GET TO GEMSTONE GROTTO-Transport to The Hobbe Cave in Rookridge-As soon as you’re in turn around and go out (don’t even take a step forward)-Swim to the right and up the narrow beach wayAnd there you are!

Legendary Items in Fable Lost Chapters for Xbox