This is a fine example of this uncommon form of Quartz. It is a four phase inclusion in a double terminated Quartz crystal found in central Pakistan 4 years ago. It is highly fluorescent under both short wave and long wave (SW pictured). There is at leas tone moving bubble that moves within the yellow petroleum. The gas bubble forms when the the Quartz cools after forming, the petroleum contracts more than the Quartz because it is less dense, it pulls a vacume within the fluid thus creating a "gas" bubble.  The four phases are: the gas bubble trapped in the petroleum, the petroleum itself, a darker brown previously organic material, and black carbon inclusions. I learned this from an insightful geologist who specializes in Quartz inclusions, whom I met at the Tucson Main show. This crystal has an attractive gold and black color range. It's in fine condition with a small contact on its underside that doesn't detract.