She's a cutie
Diamond: White Diamond (but it sometimes known to help Blue Diamond)
Shiny, Grey, and tiny. She has limb enhancers similar to Peridot's but tends to loose them loads. Her build is generally the same as Peridot's as well.
Her hair is short, and kept up then folds down in the back. It is a light grey sheen.
Graphite's eyes are Blue, with a white sheen.