I have included a .blend with a cool modifier stack for volume fracturing(limited)
Once you have downloaded the tool: fracturemod_v1_1.zip
Install from zip in the Blender Preferences > Add-ons Tab
When you enable it, the FractureMOD panel will be located in the Physics Tab(N)
Setup is simple:
Click Generate to add FractureMod to active object
A user friendly UI will be enabled, here you can control the look of the fracture pattern. Count = Number of shards you'd like to generate.
The Grid Size is the overall resolution. Note: If your object is already subdivided, remove the Remesh modifier & it will apply with the given faces.
You can control the thickness of the generated fracture.
Smoothing is also possible along with a Stone factor(iteration smoothing) for stone generation, rocks, etc.
Once you are done, hit the Extract button to convert to individual parts!