Cobble Creek: Green Fluorite with Calcite Growth (121g) Rough from China
I find it impossible to get the beauty of these types of Fluorite on camera. There are some many lines and crazy looking patterns stacked upon each other, it just wants to reflect all the light.
This particular piece has a nice shell of calcite growth on the top side. Really pretty neat.
Weight: 121 grams / 4.3 ounces
Width: 45 mm / 1.7" inches
Height: 32 mm / 1.2" inches
Length: 65 mm / 2.5" inches
Country of Origin:
Chenzhou Mine, Manaoshan Mtn., Suxian District, Chenzhou Prefecture, Hunan Province, China
Fluorite is a colorful mineral, both in visible and ultraviolet light, and the stone has ornamental and lapidary uses. Industrially, fluorite is used as a flux for smelting, and in the production of certain glasses and enamels. The purest grades of fluorite are a source of fluoride for hydrofluoric acid manufacture, which is the intermediate source of most fluorine-containing fine chemicals. Optically clear transparent fluorite lenses have low dispersion, so lenses made from it exhibit less chromatic aberration, making them valuable in microscopes and telescopes. Fluorite optics are also usable in the far-ultraviolet and mid-infrared ranges, where conventional glasses are too absorbent for use.
In geometry, an octahedron (plural: octahedra) is a polyhedron with eight faces, twelve edges, and six vertices. The term is most commonly used to refer to the regular octahedron, a Platonic solid composed of eight equilateral triangles, four of which meet at each vertex.
A regular octahedron is the dual polyhedron of a cube. It is a rectified tetrahedron. It is a square bipyramid in any of three orthogonal orientations. It is also a triangular antiprism in any of four orientations.
An octahedron is the three-dimensional case of the more general concept of a cross polytope.
A regular octahedron is a 3-ball in the Manhattan (ℓ1) metric.
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