I summoned the Golem and got the stone. I went to the ring, being sure I clicked on it. When I activated the stone nothing happened and I lost the stone. Time was about 1 pm PST.
I had troubles with this toon and someone else activating the stone but the stone up till now had always worked for this toon.
Addendum: I got another stone an this one worked!! Not sure what's going on but there's a sign post up ahead .... FYI ... I posted this again in case some one else has this problem.