This rainbow filled crystal is crazy. You can see that it looks purple and blue from one angle and then goes completely gold just by tilting it a little bit in the Sun. I also benefits from a bit of red, a good termination, and a funky keyed backside.
It measures 24 x 14 x 10 mm and weighs 3.93 grams.
https://youtube.com/shorts/Q1Fwwq7kWbg?si=M3KPZRhzR3oDTNCw