Cosmic stones is a package with 8 photo realistic strones. They are very detailed, with high resolution textures at 4096x4096. They have a diffuse map, and a displacement map rendered from a high-res version of the stone. (350.000 polygons and sculpted details) The mesh itself is 20.000 polygons. They also have a bump and detail map made from procedural shaders to give ultra high detail even in closeups.
It's made especially for sci-fi, like asteroids and alien landscapes, as shown in the promos, but works very well for contemporary and fantasy scenarios as well, such as deserts.
The props are set up for Poser, but can easily be loaded into most 3d applications for someone with intermediate knowledge of 3d programs, such as Das Studio or Vue.