1.9" Fluorite, Goshenite & Mica Association - Namibia

 
Here is an association of fluorite, goshenite and mica, collected from the Erongo Mountains in Namibia. The fluorite was listed as forming as an encasement around schorl, however there is only one location where this looks to be evident. The fluorite is a deep green, the mica has a non-metallic luster and the goshenite can be found in multiple locations around the specimen. The fluorite fluoresces a white-purple color under UV lighting.

Goshenite is a white to colorless variety of beryl.

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.

Silicon Dioxide, also know as SiO2 or Quartz, is the second most abundant mineral in the Earth's crust. Quartz crystals generally grow in silica-rich, hot watery solutions called hydrothermal environments, at temperatures between 100°C and 450°C, and usually under very high pressure. Quartz veins are formed when open fissures are filled with hot water during the closing stages of mountains forming, and can be hundreds of millions of years old.
Smoky quartz is a grey-brown to black variety of quartz. This common name is derived from from the appearance of smoke within the quartz crystal. Dependent on the location and the chemicals present during formation, smoky quartz can appear opaque black, however it’s typically translucent to some extent. It’s believed that the quartz gains this color from a combination of natural irradiation and aluminum impurities.

DETAILS
SPECIES
Fluorite, Goshenite & Mica
LOCATION
Erongo Mountains, Namibia
SIZE
1.9" long, 1.9" wide
CATEGORY
ITEM
#93699