White Diamond is shown to be about a head taller than her fellow Diamonds. She has white skin, white spiky hair in a shape similar to a pentagram star, light gray eyes with diamond-shaped white pupils, large and full black eyelashes, light gray eyeshadow, black fingernails and shiny black lipstick. Her body constantly radiates a bright light which, along with her ship's brightness, probably makes her gemstone barely visible while her other features are visible because they're either black or have black outlines. A drawing by Rebecca Sugar reveals the obscured details, as does the Hot Topic T-shirt along with the episode "Change Your Mind" and onward. Her gemstone is located on her forehead and is a side view of a round-cut diamond. White Diamond wears a white leotard with a gray top that runs from her neck to her chest, forming a triangular shape at the center of her chest with two lighter gray stripes spreading out from underneath either side of the shape, with the triangle connecting to a four-pointed star shape at her navel. She wears white and gray shoulders pads. She also wears a long transparent white dress that reaches the floor and slit up both sides to her thighs, a sleeve-worn translucent cape with black and gray stripes embedded with glimmering diamond fragments and star designs, as well as a pair of intricately detailed high heeled dress sandals.

As one of the rulers of Homeworld, Yellow Diamond's of massive size, her height dwarfing almost all other Gems. She has light yellow skin and she has black markings around her eyes, dark yellow eyeshadow, bright yellow eyes with diamond-shaped pupils and black eyebrows, and short, helmet-like bob yellow hair with two spiked tips. Her gemstone is located in the center of her chest. Yellow Diamond wears a bodysuit consisting of a yellow top half and an olive bottom half with a cutout for her gemstone, enormous yellow shoulder pads, yellow gloves, and olive-yellow, high-heeled boots. It can be assumed that Yellow wears a long overcoat that hangs past her knees when she is on Homeworld.

As one of the rulers of Homeworld, Blue Diamond has a massive size, with her towering height making her own Pearl appear tiny in comparison. However, her somewhat hunched posture, combined with her long, sweeping cloak, gives her a relatively smaller and more despondent silhouette than if she were standing straight. Her complexion is azure, and she has long, straight, alice blue hair which curls inward at the ends. Two noticeable and symmetrical locks of her hair curl and point inwards towards her face just below her cheekbones. A unique feature of her hair are two lengths of that lead from each side of her head and physically connect on her chest just below her gem, giving it an almost shawl-like appearance. She has a long ovoid face, a full upper lip, and a straight nose. She also possesses large, sad, downward-slanting eyes with bold mascara on the lower lashes, giving the appearance of a weeping woman – most likely due to her depression over the supposed shattering of Pink Diamond. Her irises are cyan with black diamond-shaped pupils and she has thin arching eyebrows. Her gemstone is located on her chest above her sternum, and she wears a long navy and midnight blue cloak that touches the ground. Underneath the upper part of her cloak, she wears a navy blue hood. Her height is similar to Yellow Diamond, only obscured by her hunched posture making her look shorter.

Pink Diamond had bubblegum pink skin, deep pink eyes with diamond-shaped pupils, and pale pink hair. Her hair was styled in a voluminous afro around her face. Her lips were accentuated with hot-pink that emulated lipstick. Her gemstone was located on her torso where a human navel would be and appeared in the shape of a convex pentagon (being an inverted-side view of a round-cut diamond). Her physical form's projection was significantly smaller than the other Diamonds but she still towered over standard gems. Pink Diamond wore a dark cerise leotard that displayed her midriff and gem in a pentagon-shaped opening. She had pink and white puffy sleeves with cerise gloves and a rose coloured chest with a white-trimmed pink peplum with a gap in the middle section, along with pink bloomers and white pantyhose. Her shoes were pink slip-ons with floating white pom poms. Her outfit resembled a ballet dancer and harlequin.