This model, suiseki rock 17, has been created using photogrammetry from a real world object. It is featuring a sculpture of a tree trunk with a rock on top.
The 3D Model is part of the Polygonal Miniatures Remastered collection, which has been optimized with better shaders, correct scaling (meters) and centered position.
We use multi camera capturing in the 3D scanning process. The scan data is cleaned and processed in Zbrush and Photoshop.
In the end, the low poly product contains unwrapped UV's, textures and normals maps. Detailed specifications can be found below:

Model Info:

- Polygons: 49,938
- Vertices: 25,014
- File Formats: .fbx, .usd, .glb, .obj, .dae, .blend
- Real-World Scale: meters

Map Info:

- Diffuse: 8,192 x 8,192 (.jpg)
- Normal: 8,192 x 8,192 (.jpg)

Look out for 3D collections as they offer more bang for the buck.

Enjoy, and have a nice day!