Nahhhh see they have chests but not defined separate boobs. It’s especially noticeable on jasper & amethysts bc their outfits probably look like they should show cleavage but instead it’s one smooth convex surface. & remember in terms of shape shifting: we see gems from space that aren’t planning on encountering any humans, and in their natural environment (spaceship/peridot presumably projecting from home world in marble madness). It seems p unlikely that they intentionally shapeshifter to look like human women. My theory is their bodies are some kind of solid digital projection from their gem (like we see the gem tech splits them into circuits & diodes but doesn’t fully affect Steven)