[aphexx]

very cool choco, lovely stones and a great technique how it seems! an absolutely underrated subject! i'd also go with glynnsmith, asking for your workflow

the single stone could use some dirt in the cavitys or moss. or even some color noises
same for the cliff. it appears a bit stylized. unless this wasnt what you wanted to achieve, you'd like to add some dirt or grass. at the bottom end do something with greens. when using for water cliffs, then also use some whites for evaporated saltwater.
at the top, also go for greens, introducing the grasslands above.

for the cliff, the features come along very frequent making it also look a bit stylized. i'd widen them up, making them more solid

anyway, nice to see some stones! not very common to see here