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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Pectoolte is indicated by NaCa2Si3O8(OH) or Sodium Calcium Silicate Hydroxide. Pectolite is actually a Silicate mineral. It is most commonly used as mineral specimen and semi-precious stone. When viewed under polarized microscope, Pectolite is no doubt to display splendid images and interesting mineral features. Pectolite however, can be confused with other minerals including artinite, okenite, wollastonite and many others. But Pectolite can be distinguished from the rest of these because they do not form with zeolites as Pectolite is apt to do. Okenite is one of those that can be found forming with zeolites but it is so soft and bendable, which is very unlikely to Pectolite. Pectolite can form very interesting mineral specimens from time to time. However, Pectolite was not that well-regarded not until a variety was discovered in Bahamas and the Dominican Republic. The trade name given to the said variety is Larimar and it has gained its success in the semi-precious stone market.

             Pectolite is most commonly found white, colorless or gray and also pale to skyblue as Lorimar. When evaluated with the aid of petrographic polarizing microscope used in optical mineralogy, the specimen sample of Pectolite can be more fascinatingly wonderful and can be more splendidly exhibited. It also shows vitreous to silky luster when viewed in reflected light of polarized light microscopes for mineralogists. Most Pectolite crystals are found transparent to translucent in appearance. Pectolite is also known to crystallize in the triclinic system of crystal formation. In optical mineralogy, this triclinic crystal system commonly comprises crystals having three axes, of which all are unequal in length and are positioned oblique to one another. The crystal habit of mineral Pectolite as described in the field of optical mineralogy usually includes fibrous tufts, radiating acicular crystals clusters and compact or botryoidal masses.             Mineral Pectolite is also most commonly found showing perfect cleavage in two directions at close to right angles when viewed more closely under polarized microscope for mineralogists. Pectolite also exhibits splintery fracture due to cleavage and this can be seen more clearly visible when specimen sample is evaluated with the aid of polarizing microscope used in optical mineralogy. The hardness measure of mineral Pectolite when specimen is evaluated using the Mohs scale method is usually ranging from 4.5 to 5. The specific gravity measure of the mineral is approximately 2.7 grams per cubic centimeters to 2.9 grams per cubic centimeters, which is of average value. Pectolite is most commonly found leaving a white streak when specimen is rubbed on a white porcelain streak plate. Splinters of mineral Pectolite do not bend and are usually brittle. Pectolite crystals are also sharp and can easily puncture the skin if not handled properly. Some specimens of mineral Pectolite can be also found triboluminescent. Mineral Pectolite is also most commonly found associated with other interesting minerals including zeolites, phrenite, calcite, datolite and serpentine. The best field indicators of mineral Pectolite usually include cleavage, crystal habit, brittleness and association with zeolites. Mineral Pectolite notably occurs at several localities including Lake Co., California and Paterson and Franklin, New Jersey, USA as well as Bahamas, Dominican Republic and also England and Italy.



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Monday, June 29th, 2009 at 2:26 pm
Category:
The Silicates Mineral Class
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