Inside archive you'll find 3 low poly rock model with 4K textures set for each. ( ..._RMA is separated texture which includes R-Roughness, G-Metallic, and B-AmbientOcclusion). Sculpt and texel density is completely 360, turn rocks as you like.
You can use it in your commercial and personal projects for free.
If you find the files are useful don't be shy to put some bucks in my piggy bank^^
The scene where I used some of them: https://www.artstation.com/artwork/rNbd2
Find me on Artstation: https://www.artstation.com/artist/andrewalexart