This Specimen has been sold.
2.6" Light-Green, Cubic Fluorite Crystal Cluster with Barite - Morocco
This is a gorgeous specimen of light-green cubic fluorite crystals, collected from Errachidia, Morocco. Under shortwave UV, these fluorite crystals fluoresce white-purple in color, with phantoms bearing deeper fluorescence visible within the crystal. There is an association of barite on the fluorite crystals.
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.
Barite, commonly spelled baryte, is well-known for its great range of colors and varied crystal forms and habits. It is a heavy mineral consisting of barium sulfate, and typically has the chemical formula of BaSO4. The barite group consists of baryte, celestine, anglesite and anhydrite. It's generally white to colorless and is the main source of barium.