7" Green Fluorite Crystal Formation - Morocco

This is a large fluorite crystal formation that was collected from Morocco. It has a green coloration and a skeletal appearance. When viewing the edge of the fluorite, the color zoning within the outer most layers is visible. Small amounts of marcasite can be found scattered throughout the exterior of the specimen.

This fluorite specimen fluoresces vibrant purple under long and short wave UV.

Fluorite is a halide mineral comprised of calcium and fluorine, CaF2. The word fluorite is from the Latin fluo-, which means "to flow". In 1852 fluorite gave its name to the phenomenon known as fluorescence, or the property of fluorite to glow a different color depending upon the bandwidth of the ultraviolet light it is exposed to. Fluorite occurs commonly in cubic, octahedral and dodecahedral crystals in many different colors. These colors range from colorless and completely transparent to yellow, green, blue, purple, pink or black. Purples and greens tend to be the most common colors seen.

Marcasite is an iron sulfide mineral with the chemical formula FeS2. It is similar to pyrite in both its chemical composition and appearance, however it forms with a different crystal structure and is much more reactive to humidity. It is often found within sedimentary rock and hydrothermal deposits, and at one point was used for its sulfur content.
Fluorite & Marcasite
7 x 6.8"