A Stone debris effect was output by FBX format, using the PBR workflow, you can download it and replace the texture you like. Please let me know if you like it. I will keep to increase these model. Please feel free to give me suggestions.
https://youtu.be/NJ7zKwHIiCw
Hope you like my other works too
destruction https://sketchfab.com/PaulYang/collections/destruction
Balloons https://sketchfab.com/PaulYang/collections/balloons
Feather https://sketchfab.com/PaulYang/collections/feather