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The chemical formula of mineral Celestite is indicated by SrSO4 or Strontium Sulfate. Celestite is actually a Sulfate mineral. Celestite was actually first discovered in the year 1791 near Frankstown in Pennsylvania. A G Werner, a German mineralogist, discovered the first specimen of Celestite. The name of the mineral species Celestite was actually derived from the Latin word caelestis, which means celestial or heavenly. This is actually an allusion to the dusky sky blue crystals of mineral Celestite, which has a very ethereal appearance. Celestite 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.

 

Celestite minerals are considered as ores of element strontium. Celestite ore mineral is commonly found having interesting image when viewed under an ore polarizing light microscope. Most serious mineral collectors consider mineral Celestite as their favorite. When viewed with the aid of polarized microscope used in optical mineralogy, the celestial sky blue color of Celestite is splendidly attractive, pretty and unique in the mineral world. When mineral Celestite is found forming with several other minerals, it is commonly found making a very nice piece of mineral combination. The combination is very colorful when blue Celestite mineral forms with bright yellow sulfur and this piece of specimen is actually considered the most famous mineral combination.

 

Celestite has the same structure as Barite, whose chemical composition is indicated by the formula BaSO4. Barite and Celestite minerals are forming very similar crystals forms. By ordinary means, the two minerals may seem very identical. But using the flame test method, the identity of the crystal of each mineral can be identified. Using the flame test, Barite mineral will show a pale green flame while Celestite mineral will show a red flame. The reaction of each element, strontium and barium, with the flame produces those colors. Normally, mineral Barite is not found in blue color. However, most blue Barite minerals are commonly misidentified as Celestite. Mineral Celestite is considered as an outstanding mineral, which can be displayed in the cabinet of someone or in a display case. This is because of the nice crystals of Celestite, its good luster and its attractive blue color that could appear more fascinatingly wonderful when viewed under polarizing microscope for mineralogists.

 

            Celestite is most commonly found exhibiting blue color in transmitted light of polarized microscopes used in optical mineralogy. Sometimes it can be also found colorless, yellow and sometimes with tints of red, green and brown. It is most commonly found exhibiting a vitreous luster when closely viewed in reflected light of petrographic polarizing microscope for mineralogists. Celestite also exhibits a perfect cleavage in one direction and less so perfect in another direction when the mineral is closely evaluated between crossed nicols of polarizing light microscope for geologists. Celestite also exhibits conchoidal fracture when it is evaluated under several adjustments on the aperture diaphragm of petrographic polarizing microscope for mineralogists. The specific gravity measure of the mineral specimen Celestite usually gives an approximate value of 3.9+ grams per cubic centimeters, which is considered above average for translucent minerals. The hardness measure of mineral Celestite when it is evaluated using the Mohs scale method is commonly found ranging from 3 to 3.5. Celestite is most commonly found leaving a white streak when mineral specimen is rubbed on a white porcelain streak plate.

 

            Celestite mineral crystals are most commonly found transparent to translucent in appearance. The crystal habit of mineral Celestite as described in the field of optical mineralogy commonly includes the bladed crystals, which are dominated by two large pinacoid faces top and also bottom and small prism faces are found forming a jutting angle on every side. Several variations of these faces are found but the flattened blades and tabular crystals are the most common. The resulting prismatic crystal has a rhombic cross section if the pinacoid faces become diminished or are absent. This crystal habit of mineral Celestite is rather common in specimens found from Madagascar. Celestite minerals can be also found as nodular, fibrous and granular forms, which are very nice and interesting to view under polarized light microscopes used in optical mineralogy.

 

            Celestite is most commonly found showing biaxial positive figure when evaluated between crossed nicols of petrographic polarizing light microscope used in optical mineralogy. Specimens of mineral Celestite are commonly found exhibiting a moderate surface relief when closely examined under several minor adjustments on the aperture diaphragm of polarizing light microscope. Celestite also shows very weak pleochroism under polarized microscopes for mineralogists. Celestite minerals are showing red flame in a flame test. Some Celestite mineral specimens are found fluoresces under an ultraviolet light. Celestite mineral, like all pale blue stone, has the ability to relate to communication and creativity. It has also the ability to enhance peacefulness and mental clarity and these are actually considered as the special attributes of mineral Celestite. There is no specific data on the toxicity and health dangers for mineral Celestite. However, specimens of this mineral Celestite should be treated with great care and use of sensible precaution is advised upon handling them.

 

            Celestite mineral is most commonly associated with several other interesting minerals such as calcite, sulfur, gypsum, strontianite and fluorite. The best field indicators of mineral Celestite usually include color, crystal habit and flame test. Celestite minerals should not be stored or rather exposed direct to sunlight. The best specimens of mineral Celestite are actually found in cavities of sandstones and limestones, which are often found as geodes. These Celestite crystals are commonly found in sedimentary rocks and mostly in good crystal form and these mineral crystals are usually in high demands by most mineral collectors. Mineral Celestite notably occurs at some types of localities like the Lake Erie region of Ohio, Michigan and also New York in the United States as well as in Sicily and Germany.



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Monday, December 29th, 2008 at 6:29 am
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The Sulfates Mineral Class
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