Sphalerite is an unusual rare gemstone which is craved for by people as it possesses more brilliance than diamonds. It gets its name from the Greek word which means "unfaithful rock", which was given in the year 1847 by E. F. Glocker .
Sphalerite (ZnS) is a mineral that is the chief ore of zinc. It consists largely of zinc sulfide in crystalline form but almost always contains variable iron. When iron content is high it is an opaque black variety, marmatite ((Zn,Fe)S).
Sphalerite
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Sphalerite, also known as Blende, is one of the few minerals having six directions of cleavage. If six directions are perfectly cleaved on a single crystal, it forms rhombic dodecahedron.
Sphalerite
Chemical composition -- Zinc sulfide with iron.
Color-- Yellow to brown, orange, green, black, rarely colorless.
6.) Elmwood Mine, Smith Co., Tennessee
7.) Pachapaqui, Peru Quartz, Sphalerite, Calcite, Pyrite
8.) Tri-State Area, USA
9.) Tri-State Area, USA
10.) Tri-State Area, USA ...
How hard is sphalerite?
What is a gemstone?
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Enhancements
Sphalerite is not known to be enhanced.
More information on gemstone enhancements.
Sphalerite ...
SPHALERITE (Zinc Sulphide)
Sphalerite at Strontian is commonly found as crystalline masses. However, small black crystals, often embedded in barite or in the granite walls of veins, are also found.
Sphalerite
Deep reddish orange. A very rare find both in quality and size.
Weight: 23.15 carats
Size: 18.74 x 15.01 x 9.1 mm
Cut: Oval
Enhancements: None
Price: $2,778 total
Ask for inventory #11467 ...
Sphalerite: .156
Strontium Titanite: .190
Natural and Synthetic Rutile: .280
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Sphalerite
Resinous
(Some resinous minerals might seem metallic at first, but look closely: their surfaces seem a little more like overly-tinted glass than like metals.)
Talc ...
Sphalerite"The major zinc ore and an interesting mineral.
Spinel"Rugged oxide mineral of metamorphosed limestones.
Staurolite"A typical crossed pair of crystals in a mica-schist matrix.
SulfideSphalerite
ZnS
Most distinguishing features:
Low specific gravity distinguishes it from galena, as does colour. Lustre also indicative.
An alteration product of sphalerite, it occurs with other zinc minerals, particularly smithsonite, from which it is distinguished by its strong pyroelectricity. Fluoresces bright orange in LW UV.
Herderite ... calcium beryllium phosphate ...
Primary sulfide minerals such as pyrite, chalcopyrite, galena, and sphalerite are in particular vulnerable to oxidization and alteration.
When removing the "sphalerite" crust on quartz crystals from the Spring Glen Mine in Ellenville it is not uncommon to repeat three day sessions removing any loose material between each session.
Kourimsky states in his Illustrated Encyclopedia of Minerals and Rocks that hemimorphite "most frequently occurs as the product of the oxidation of the upper parts of sphalerite accompanied by other secondary minerals that form the so-called ...
This is a four faced form and some minerals to name in this form are diamond, helvite, and sphalerite.
TRISTETRAHEDRON:
This form generally has twelve triangular faces and mineral instances of this type are sphalerite and boracite.
Montana.--Facet-quality calcite and sphalerite are recovered from deposits in the State.
Zinc - A blue-grey metal used for galvanising (coating) iron and steel to protect against rust. The main zinc mineral is sphalerite. Brass is an alloy of copper and zinc. The chemical symbol for zinc is Zn.
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This is only a relatively common form on tetrahedrite, usually subordinant to the tetrahedron (fig. 3.16), but has also been reported on sphalerite and boracite.
The term adamantine is used to describe any gemstone that has diamond-like luster. Only a few gems exhibit such exceptional light reflectance: cerrusite, sphalerite, and demantoid are three examples.
adularescence ...
Although sulfides should not be considered ionic, the sulfide minerals rarely contain oxygen, so these minerals form a chemically distinct group. Examples are pyrite (FeS2), sphalerite (ZnS), and galena (PbS).
(Sphalerite)
Reticulated - A habit made up of slender crystals crossing each other in a network pattern. (Cerussite)
Rhombohedron - A crystal having six sides, each of which forms a parallelogram. (Hexagonal system) ...
 See also: Import, Copper, Color, Stone, Rough
  
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