These are 5 stone models made using photogrammetry techniques.
Each model comes with 3 LODs:
They are also fully retopologised, and so have all quad geometry that is easy to work with.
All models have full PBR mapping, with a diffuse, roughness and normal map for each.
The blend file also comes with an extensive and easy to use material, with controls for things such as:
It is also easy to switch LODs with the blend file as you can just change the level of subsurf to improve detail