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The chemical formula of mineral Conichalcite is indicated by CaCuAsO4(OH) or Calcium Copper Arsenate Hydroxide. Conichalcite is actually a Phosphate mineral. Conichalcite was actually first discovered in the year 1849 at Andalusia, Spain. The name of the mineral Conichalcite was derived from the Greek words konis, which means powder and chalx, which means lime. Conichalcite is known to crystallize in the orthorhombic system of crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths. Conichalcite is considered as a minor ore of copper. It is also commonly used as mineral specimens, which are exhibiting a nice and splendid image under petrographic polarizing light microscopes. Conichalcite is commonly found exhibiting a nice sparkling grass green color that is hard to mistake for any other attractive mineral when observed under polarized microscope. Conichalcite is also most commonly forms a solid solution series with the interesting mineral calciovolborthite. In optical mineralogy, a solid solution series will readily occur when two or more minerals are found structurally identical where they can interchange elements within their chemistries with any dramatic alteration on the crystal structure of the mineral. In the case of the two interesting and attractive minerals Calciovolborthite and Conichalcite, the two interchanging elements are the vanadium and arsenic. Mineral Conichalcite is considered as the arsenic rich end member of the solid solution series while Calciovolborthite is the vanadium rich end member.

 

            Mineral Conichalcite is most commonly found exhibiting grass green to light green colors when closely viewed in transmitted light of petrographic polarizing light microscope. Conichalcite is most commonly found exhibiting a vitreous luster when it is in reflected light of polarized light microscope used in optical mineralogy. Conichalcite has absent cleavage even when it is closely evaluated between crossed nicols of petrographic polarizing light microscopes for mineralogists. Conichalcite is also showing uneven fracture when it is examined under several adjustments on the aperture diaphragm of the petrographic polarizing microscopes used in optical mineralogy. The specific gravity measure of the mineral usually gives an approximate value of 4.3 grams per centimeter cube, which is considered heavy. The hardness measure of mineral Conichalcite when it is evaluated using the Mohs scale method is usually 4.5. Conichalcite is most commonly found leaving a green streak when specimen of mineral is rubbed on a white porcelain streak plate.

 

            Conichalcite mineral crystals are usually found transparent to translucent in appearance. The crystal habit of mineral Conichalcite as described in optical mineralogy commonly includes crusts of acicular to almost fibrous crystals that are commonly found very interesting when viewed with the aid of petrographic polarizing light microscope used in optical mineralogy. Conichalcite can be also found in form of botryoidal masses and compact crusts that are usually found exhibiting nice and fascinating microscope images under polarized light microscopes for mineralogists. Conichalcite mineral can be also found in uniformly indistinguishable crystals that are forming large masses. It can be also found exhibiting a reniform or kidney like shape when evaluated under petrographic polarizing light microscopes.

 

            Mineral Conichalcite is most commonly found showing a biaxial figure when it is viewed between crossed nicols of petrographic polarizing light microscopes used in optical mineralogy. The refractive indices of the mineral when it is evaluated under polarized light microscope for mineralogists are commonly found ranging from 1.730 to 1.846. The maximum birefringence found when Conichalcite is evaluated under polarizing microscopes is usually in a range of 0.041 to 0.046. Conichalcite is also most often found exhibiting a very high surface relief when it is evaluated under several minor adjustments on the aperture diaphragm of the polarizing light microscopes for mineralogists. Conichalcite has a strong dispersion when it is viewed in transmitted light of polarizing microscopes used in optical mineralogy. There is no specific data found on the toxicity and health dangers for mineral Conichalcite. However, the specimens of this mineral should be treated with great care and use of sensible precaution is advised upon handling them. Conichalcite is a not magnetic mineral. It is also a not radioactive mineral species.

 

            Mineral Conichalcite is most commonly found associated with several other interesting minerals such as adamite, malachite, cuproadamite, limonite, beudantite, olivenite and smithsonite. The best field indicators of mineral Conichalcite commonly include color, density, crystal habit and its wonderful association with several other interesting minerals. Mineral Conichalcite is often encrusted onto limonitic rocks, which are commonly found exhibiting a red to yellow color under geological polarizing light microscope and are commonly found producing a very colorful specimen when viewed under polarized microscopes. Conichalcite minerals are commonly found in copper ore bodies most especially in the oxidation zone areas. The ground water that are oxygen rich, which might react with copper sulfide and or copper oxide minerals and eventually producing a wonderful assortment of colorful and attractive minerals that often form in the oxidation zone. And one of these colorful and attractive minerals found is interesting Conichalcite, which commonly exhibits a nice and wonderful colorful appearance under polarized light microscopes. Among other oxidation zone minerals include azurite, linarite, malachite and many others. Conichalcite minerals notably occur at some famous mineral localities like Juab Co in Utah, Arizona and also in Nevada in the United States. Conichalcite can be also found in Chile, Mexico, Zaire and Poland.



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Monday, February 16th, 2009 at 2:45 am
Category:
The Phosphates Mineral Class
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