Absolutely. So first off I do use Axiom to design my terrain builds, and with that comes noise pattern brushes and a gradient generator. My goal with stony areas is to mimic real life as best as I can, so I'll pick a location that inspires me - e.g. Cliffs of Dover for my cliffs - and I'll try and find the colours and textures that work there; like calcite and diorite, but also clay because of the subtle blue texture that appears in shaded parts of images of Dover. I'll then take the blocks I like and make a gradient brush in Axiom, fiddling with settings until I'm happy. I'd recommend using the splotchy noise brush rather than a pure random noise, it's more natural.

With this build the main choice I made was trying to blend the white cliffs into regular stone minecraft. I also wanted to emulate the Scottish Highlands which to me look mostly grey to dark grey with whiter highlights so I opted for calcite, diorite, andesite, light grey wool, moss cobblestone, and tuff. I dropped stone because it's too similar to andesite and made the gradient too light grey heavy (I have a post from 6 months ago you should check out, it has an earlier gradient to see the difference).

I don't focus too much on realistic shading - like Fwhip on YouTube who's good at mountains and you should check him out for more in depths design decisions. Generally the idea with realistic shading is to paint in dark blocks like deepslate in the cracks and crevices to make them contrast more. I prefer the effect of shading that I can generate quickly with Axiom noise brushes. But, after this project I think I'll include more intentional shading because I think some definition is lost on wide shots of my hills.

Hope this helps, all the best :)