4.5" Fluorite, Celestine (Celestite), Calcite & Sphalerite - Tennessee

 
This is a beautiful specimen that contains an association of calcite, fluorite, sphalerite & celestine, collected from the famous Elmwood mine in Tennessee. The fluorite and calcite crystals are small and together they encrust a large portion of the celestine matrix. The celestine formation is fibrous and white, and seemingly holds the specimen together like a glue. On what could be considered bottom of the specimen, there are multiple sphalerite crystals. Under short wave UV, the calcite crystals fluoresce orange in color.

Comes with a display stand to assist with preferred presentation.

The Elmwood Mine is a zinc mine in Carthage, Tennessee which opened in 1969, before being closed for many years, only to be reopened in 2010. It has produced many world class specimens of Fluorite, Calcite, Barite and Galena over the years. Specimens used to be plentiful as miners were allowed to recover specimens, but collecting is strictly prohibited by the new mine owners. They've gone to great lengths to prevent the mining of specimens, including blasting crystal pockets or filling them with slurry.

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.

Sphalerite is a part of the sulfides group and typically exhibits a grey/black appearance due to high concentrations of impurities. When sphalerite is in it's purest state, the chemical composition is ZnS, and can display a gemmy transparent light tan/yellow color. This is one of the few minerals that can form crystals ranging anywhere between gemmy and transparent to opaque and metallic-like. Opaque or cloudy sphalerite tends to be most abundant, due to the ease of iron replacing zinc in the process of formation.

Calcite, CaCO3, is a carbonate mineral and the most stable polymorph of calcium carbonate. The other polymorphs are the minerals aragonite and vaterite. Calcite crystals are trigonal-rhombohedral, though actual calcite rhombohedra are rare as natural crystals. However, they show a remarkable variety of habits including acute to obtuse rhombohedra, tabular forms, and prisms. Calcite exhibits several twinning types adding to the variety of observed forms. It may occur as fibrous, granular, lamellar, or compact. Cleavage is usually in three directions parallel to the rhombohedron form.

FOR SALE
$75
DETAILS
SPECIES
Fluorite, Celestine, Calcite & Sphalerite
LOCATION
Elmwood Mine, Carthage, Tennessee
SIZE
4.5 x 4.3" entire specimen.
CATEGORY
SUB CATEGORY
ITEM
#103961