These are raspberry pi themed earrings. I recommend printing them in a slower printspeed. I have watercolored 'em and washed the paint off after letting it dry.
found on page: https://en.wikipedia.org/wiki/Raspberry_Pi
The Raspberry Pi is a series of small single-board computers developed in the United Kingdom by the Raspberry Pi Foundation to promote teaching of basic computer science in schools and in developing countries.
Raimon of IdeaLab
I have printed this model in white Ultimaker PLA and my printspeed is 25mm/s, my resolution is 0.2mm and my infill is 18%. I have used a skirt for ultimate priming at the beginning of the print. I used a 0.4mm nozzle and my extruder temperature was 210 degree Celcius(normal PLA temperature). Don't hesitate to use your own configuration, cause settings and printers can change.. .no worries!