Physical features
1. Color- Colorless, blue, yellow green, brown, violet, and pink.
2. Streak- White.
3. Luster- Vitreous.
4. Cleavage- Perfect.
5. Transparency- Transparent to sub transparent.
6. Fracture- Conchoidal to flat.
7. Hardness- 4.
8. Forms- Cubes.
Fluorite is known for it's brilliant colors, and gets its name from the fact that it fluoresces under ultraviolet light. This attractive mineral is the natural crystalline form of calcium fluoride. Pure Fluorite is crystal clear, however can show many different shades such as violet, blue, green yellow, brown, pink, and black. The change in colors are due to tiny amounts of other elements taking place of the calcium in the molecular structure. Fluorite mostly occurs in mineralized veins in limestone bedrocks, and also in granite. The most common uses for this important mineral is flux in steel and in aluminum processing. Much of the important Fluorite deposits are in the U.S.A and can be found at Rosidare and Cave-in-rocks of Illinois, and many other places around the world.
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