This is trained on artwork by Nominu. Seems to work best on its own but will work with other models. Was originally an attempt at a LoRA for general petrification images, which it does do, but mostly it's ended up just a nice art style.

Along with the trigger In4nTF, you might also want to try, Untransformed, Starting Transformation, Mostly Transformed, Fully Transformed, Petrification, into stone.

Seems to work quite nicely at strength of 1.0 and around 25-30 Steps.

From my testing it works well with WAI-NSFW-illustrious-SDXL, but please experiment as I have not done an exhaustive test of all of them.