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Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of the Jade mineral is indicated by Na(Al, Fe)Si2O6 or Sodium Aluminum Iron Silicate. Jade is actually a Silicate mineral. It is a known member of the Pyroxene Group of minerals. The name Jade was derived from the Spanish term piedra de ijada or loin stone. This is actually from its reputed efficacy in curing ailments of kidneys and of the loins. The term Jade is usually applied to ornamental stones from China and Central America that were being brought to Europe. However, in 1863 it was realized that the name Jade was actually being applied to two different minerals. Because the two minerals are very exquisite and hard to distinguish from each other, jade was put to task and the both minerals are being called Jade. Jade crystallizes in the monoclinic system. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. Jade minerals are commonly found tough since they consist of dense, close grained, matted aggregates.

 

The toughness of mineral Jade is very remarkable most especially in the field of optical mineralogy. It has the strength greater than steel and was actually put to work by many early civilizations for axes, weapons and knives. Jade also became a symbolic stone used in ornaments as well as religious artifacts during the eons. Jade is a variety of both jadeite and nephrite. Jade is commonly used as gemstone and ornamental stone for it is often found exhibiting wonderful brilliance under petrographic polarizing light microscopes.  The two Jade minerals Jadeite and nephrite are usually found exhibiting nice and interesting microscope appearance under polarizing microscopes used in petrology. Jadeite is almost never found in individual crystals but it can be seen clearly visible when viewed with the aid of petrographic polarizing microscopes and it is commonly found as composed of microscopic interlocking crystals that produce a very tough material.

 

Jade is commonly found having biaxial positive figure when viewed under polarizing light microscopes used in optical mineralogy. Its maximum birefringence of Jade as described in optical mineralogy is usually found ranging from 0.013 to 0.023. The index of refraction of mineral Jade is usually found ranging from approximately 1.66 for jadeite to 1.62 for nephrite. Mineral Jade is most often found showing attractive shades of emerald green as well as white, gray, yellow, orange and violet that is commonly splendidly exhibited under petrographic polarizing light microscopes used in the field of optical mineralogy. Jade commonly exhibits a greasy luster when viewed in reflected light of polarizing light microscope. Cleavage does not apply due to the massive nature o mineral Jade. Mineral Jadeite is usually found exhibiting uneven fracture that can be noticed clearly when viewed closely with the aid of the petrographic polarizing microscope used in optical mineralogy. The hardness measure of Jade when it is evaluated using the Mohs scale method is usually within the range of about 6.5 to 7. When Jade specimen is rubbed on a white porcelain streak plate, it is commonly found leaving a white streak.

 

Nowadays, Jade is still being valued for its fascinating beauty most especially its wonderful brilliance when viewed under polarized light microscopes. Its many attractive colors are very much appreciated. Jadeite however produces well the emerald green color of Jade minerals. And most mineral collectors usually seek after this one. Emerald green colored Jadeite is also called Imperial Jade and this color is actually brought about by the presence of chromium in the chemical composition of jadeite. Other colors exhibited by Jade that are so majestically exhibited under geological polarizing microscope are influenced by iron and manganese. The green or brown colors are due to traces of iron while the violet shade is produced by manganese. Nephrite on the other hand is usually found green and creamy white in color that is also amazingly interesting when viewed under polarizing light microscopes. Jadeite can actually have the full range colors of Jade mineral.

 

The best field indicators of Jade minerals include colors, toughness, and hardness. Jade notably occurs at several localities including China, Russia, New Zealand, Guatemala, Burma or Myanmar, the Swiss Alps and also in Western Canada.



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Tuesday, July 29th, 2008 at 7:25 am
Category:
The Silicates Mineral Class
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