I would start with a PBR texture set that looks like the pattern you want. Then turn up the transmission roughness all the way and adjust transmission until it looks right.
You can search for [
Himalayan Salt Blocks, select Large for the image size and grab a few that are close to what you need…you might need to remap the texture to a UV flat Plane if it is skewed when you find them…
Materializer is a really good way to create your base maps from the diffuse image…
Just had time to mock up a quick example…no time to map it but used the first wall example…