Sapphire has pale blue skin, and slightly lighter hair that covers the upper half of her face. She wears a floor length dress that is dark blue on the top with a blue skirt with white puffed sleeves and a sky blue pinafore worn over the top. When viewed from below, her dress resembles an open geode. She also wears long white gloves. Her lips and facial structure resemble Garnet's. Her gemstone is on the palm of her right hand and has a triangular facet.
Not much is known about Sapphire's personality at this time, but it is very clear that she is very compassionate and level-headed. She seems to balance out Ruby's more impulsive personality when they're fused as Garnet. She's shown to hold some intelligence, as she came to the conclusion that Steven was immune to the force field due to his half-human side almost immediately.