Yea...
What I was thinking, the main mineral is inside a quartz shell. It does validate my claim on being a emerald on the visual UV test, but again, it could be something else. I was told to do some bore test like drilling a hole inside the stone to pull out samples. I dont know if that would be a such a great idea to even do that. Hmm...
However, again.. when I turned off the UV, in total darkness, the stone glows a little. I tried capturing it with the webcam, it doesnt work because its too dim.