SC307 - Petroleum Quartz

Double terminated petroleum quart. A nice little crystal with lots of yellow oil inclusions. Most are small and “solid”, one is larger, and contains a moving bubble (of what?). Under LW light, the solid inclusions fluoresce a very bright blue, while the larger one has a more yellowish tint (in the photo it is the white/oversaturated blob). The fluorescence spectrum shows a lot of superimposed peaks in the blue region (400-500nm), with the maximum of emission in the green region (500-550nm).