It's always the ones with the inverse of the texture I want that are the best.
I did try using some oven bake clay to make stamps from more pointy rocks. It ,didn't really work that well but might be worth a revisit one day.
I'm loving all these sculptures, they're great!
I've started a couple myself (mostly at my kids requests

), but they'll likely take weeks to finish. How do you keep the clay at the moisture level you want over days/weeks? I've been shutting mine in mini buckets with lids. Wondering if there's any tricks I have missed?