I went looking in free stuff for some jewelry that would be a good candidate for using this shader.

I found this:

http://www.renderosity.com/mod/freestuff/details.php?item_id=61750

Here is how that renders with the shaders provided. The shaders do not use real reflection, so do not react to the objects and lights in the scene. They use environment maps, which are OK but not my preference.

Click for full size.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)