Petroleum Fluorite | SpecimenPetroleum Fluorite Quick Overview: Petroleum Fluorite is a rare type of fluorite that contains tiny inclusions of natural petroleum (crude oil) trapped inside the crystal during formation. These inclusions sometimes appear as small yellowish droplets or bubbles. UV Glow Reaction: Under UV light (especially shortwave), the petroleum inclusions often glow a yellow green or bright yellow color. The fluorite itself may not fluoresce strongly, but the