Yep, it’s mostly DS shaders, DS4 for best results, some of them are a little wonky in DS3. If you use Poser this will be next to useless for you unless you want to apply the texture maps yourself. There are poser material products similar to this on the market though, so I don’t really see a point to go through that effort. (look at Rendo)
The disk necklace with the cord attached is a conforming figure for genesis. There is also a prop version of just the disk pendant that is in Poser format and will work dandy in pretty much any program. Obviously not worth buying the package just for that if you only use Poser.