The Mom Swapped alternate universe is where Stevens three mother figures, The Crystal Gems, take the place of the Homeworld Gems and vice versa.

Peridot is usually swapped with Pearl but has been swapped with Amethyst on rare occasions.

Jasper is usually swapped with Garnet but it's not uncommon to see her take on the role of Amethyst.

Lapis Lazuli is usually swapped with Amethyst but has also been swapped with both Garnet and Pearl on occasion.