Beautiful work, thanks for sharing!
Oh and that face tuck inside a hood I feel your pain, I just did a face inside a full face helmet and it's not an easy task. The cloak looks awesome!
Oh and if you'r looking for ways of doing texture on your stone you can always try the sponge technique, with a small piece of foam (inside a blister pack or something) you can dip the sponge into your paint, remove the excess and then gently press with the sponge until you get what you want, it will leave a nice texture like stone. I use a old brush that i cut the ferule off and i can super glued a small piece of foam on the brush and voila you have a sponge brush.
It's hard to see on those pictures I took 2 years ago but it can give you an idea,
I did those crypts for my Vampire counts (tabletop standard) and I used the sponge technique.