phosphophyllite - phos

She is very energetic and cheerful, somewhat childish but cool, she always tries to give her best.

She has mint-colored hair that's gone blue and short
has pale or white skin (from my point of view)

I don't know how to explain the clothes, but if you saw the anime you'll understand me!

bort: diamond hardness 10, serious and tough, long black hair
Diamond: 10 strength diamond, white hair with light rainbow shades
alexandrite: diamond that... idk
Rutile: diamond in charge of reassembling the other diamonds when they break, or rather the doctor, she is somewhat tough
Cinnabar: diamond with hardness 2.5, the weakest, comes out at night to make sure those from the moon don't come, it has poison
amethyst 33 and amethyst 83 (or 84 I don't remember well) : Twin diamonds, purple hair with one eye covered both, some hair decoration like braids
kongo sensei- adamant teacher: I don't know exactly if it's a stone or a diamond, it's bald and tall

Sorry if some characters are missing, I was too lazy to put the others