Hi Bruce,
At a second glance, you may win the prize! I took a good look
at the matrix, and it goes from green to a really dark blue…
not black as I thought. There’s actually a thin region of
intense blue before it gets really dark. And the “minty” green
does have a cool blue tone to it…
Thanks again to everyone for your input! And, yes, I do go to
Franklin! That’s actually the gem show over the summer where I
bought it! 
Dave Sebaste