September

Girl's name is September, nickname Ember, the month's birthstone is sapphire, which is the color she uses (blue sapphires, that is, even though I like the black ones better.) She is INFP.

Embers are the glowing, hot coals made of greatly heated wood, coal or other carbon-based material that remain after, or sometimes precede a fire. Embers can glow very hot, nearly as hot and sometimes as hot as the fire which created them.
en.wikipedia.org/wiki/Ember