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The Mineral Covellite

Covellite or covelline is an odd copper sulfide mineral. Indigo blue in color, it is ever present in copper ores, though in limited quantities. Though not a significant ore for extraction of copper, it is loved by collectors of minerals.

Chemical Formula  
CuS

Derivation of Name  
Got it so named from the Italian mineralogist, N. Covelli (1790-1829).

Occurrence
This mineral is coupled with chalcocite in regions having deposits of secondary enrichment of copper sulfide. Frequently found with and also as coatings on Bornite, Chalcocite, Chalcopyrite, Pyrite, Enargite and other Sulfides.  It is also found as pseudomorphic   

replacements of other minerals. Regardless of very exceptional occurrence as a volcanic sublimate, its initial portrayal was at Mount Vesuvius by Nicola Covelli (1790–1829).  

Gemology  
The mineral Covellite arouses a positive attitude to life… and perhaps guides you in transforming your dreams to realism. In certain ways,  this stone appears to contradict in nature… the reason being the difficulty in working with the stone. This influential stone is used to track ones past… and a means for reviewing and realizing the karma connected with the situations that occurred in the past life, thereby,  permitting some people in accessing the Akashic records of their etheric realm… Covellite aids in this mission.

Source 
Covellite is endemic in the USA. Covellite occurs in veins as deep as 1,150 meters, in the Silver Bow County of Montana, where it occurs in the primary state. In these veins Covellite is found in a cluster form to a meter long in the Leonard mines of Montana. The inferior quality of Covellite is formed in the boundary of the water bodies that descend in the zones of the supergene enrichment where it gets oxidized, Covellite is redeposited on hypogene sulfides (chalcopyrite and pyrite), and also found in Foard County of McCellan copper mine in Texas. Covellite is also found in the local zones of the salt domes.  A rare incidence of covelllite was seen in the replacement of the organic debris of New Mexico in the red beds

Mineralogy  
Though the indigo blue crystals are rarely perfect, it is their luster that makes them remarkable. Covellite has a structure somewhat similar to those of phyllosilicate minerals. In its case some copper ions are at the center of sulfur tetrahedrons that are connected at their bases to form sheets. Very rarely is it found as a primary mineral in copper deposits and has still little likelihood of being found as a volcanic sublimate. Its formations are known to appear in weathering environments close to the surface in deposits where copper is the primary sulfide. As a primary mineral, availability of covellite is limited to hydrothermal conditions.  Covellite's inimitable crystal structure is correlated to the circumstances of its formation. Its distinct structure is formed during oxidative formation conditions.

Color           
It has a deep metallic indigo blue (flawed to purple or black) with flickering yellow and red flashes.

Density                              
4.602 g/cm3

Mohs Scale Hardness
1.5 - 2.

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