Oh I might not described properly. i meant the doors would look frameless when installed but it would still have a frame. I added a picture to show how it should look after install.

I need to see the wall I cannot imagine this type door in a stone wall .

Hi, I'm from the Caribbean as well and looking into this type of installation too. Here are a few I found, they will work with masonry walls. The install process is similar to drywall but will be a bit more work, you can ook at the videos and read the installation instructions to get the idea. https://ezconcept.com/products/ezyjamb/ezyjamb-src/ https://www.insensation.com/product/fs1/ https://arlu.be/en/products/invisidoor-20

I have these doors in my house. The door jambs wrap around the wall and are fastened to the framing over the plaster or drywall substrate and then the wall is finished with joint compound, finish plaster or stucco after installation.

I would imagine these would be relatively hard to set into a masonry opening. The jamb thickness can be specified and the classic version is adjustable to a degree.

I should add that the frames are relatively expensive, the concealed hinges are very expensive, and the labor is increased quite a bit. Compared to a typical, out of the store, pre-hung, pre-drilled door that gets set into the typical rough opening and the edges covered with millwork, it's probably a cost factor of x 5 at least, and if you are doing special finishes on the door for a high finish appearance it could be a factor of x 10.

@palimpsest I don't think it is so much more trouble. oncrete blocks come in 4", 6" and 8" sizes, the ezyjamb just about gets on the 8" and the instructions advice you to use a timber stud attach that to the cmu and then attach the frame to the timber stud. Alternatively, I thick you could use concrete screws and skip the timber stud altogether. Then you can plaster everything (cmu and frame) together.