Amber Colored Contacts: Unveil the Mysterious Charm Behind the Glow
Longwave should do the trick. Most amber fluoresces with UV, glowing a blueish to green color. Also, amber will float in a heavy salt water. Your piece looks quite a bit like Indonesian amber with the color & fracturing. I would agree! I have 1kg Indonesian amber in my collection because I wanted to see how they are compared to those from other ...
Mysterious Charm - Star Wars Outlaws Guide - IGN