Dude, you need more than a single texture to get a realistic result. Use the principaled shader if you have the latest version and get some good rock textures then use the microdisplacement feature I’d say.
If you want the rock text to stand out make the background much simpler, more like a solid color
I have principaled shader. Do you have any beginner tutorials you can point me to how to use the principaled shader to create more than 1 texture to get realistic results?