sometime, i notice that garnet acts more like ruby or more like sapphire.

like in love letters

when garnet says NO YOU DON”T to jamie, her visor is more red, she say this pretty sternly. 

but when she gives her little speech about how jamie is a good actor, her tone is calmer, kinder. Her viser also changes color to be mostly blue with only the flash of heart broken jamie, when it comes back to her, the visor is different. 

there was also in reformed, garnet answers amethyst very calmly, explaining that she followed the slinker through a tunnel. her visor is mostly blue when she speaks calmly.

see here, garnet gets more sassy and a little in amethyst’s face about the slinker. her tone is much stricter than a second ago and her visor is mostly red.