Folio Lighting is an Italian company specializing in edge-lit lighting panels. All of their fixtures are manufactured in Italy and have a 6-8 week lead time that includes shipping. They pride themselves on custom work so they do not have any standard sizes. The panels can come in 35K, 4K, 65K or RGBW. You can either use the lit panels on their own or with a diffuse panel in front of it that they provide. Another interesting thing they can do since they are so custom oriented, is curve the LED panels.
They also provide their own stone panels that are 3mm thick with 3mm of glass on one side. The thickness of the stone allows light to be transmitted evenly when installed against their edge-lit panels. We are not sure if the stone comes installed onto the LED panels or not though.
We also took a look at their Rego Line and Frame fixtures which are built fixtures with edge-lit LED technology. The fixtures come in options of 2", 4", 6", 8", or 12" widths. Custom lengths are available as well as lit corner pieces.