Leave a message
Fri
15
May

Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of mineral Nealite is indicated by the formula Pb4Fe(AsO4)2Cl4 or Lead Iron Arsenate Chloride. Nealite is actually a Phosphate mineral. Nealite is only used as mineral specimen and it is most often found showing interesting microscope images when viewed with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. Nealite is said to be a very rare mineral. This mineral species was named after an American mineral collector, Neal Yedlin. This Nealite mineral is known from onlyu one mineral locality, Lavrio, Greece. This locality is formerly Lavrion and Laurium. This mineral locality has been mined for centuries now starting with the Greeks and then the Romans for the lead content of its ores.

 

            It has been found that the left over rocks that were judged as poor in the metals to be processed by the ancient miners were dumped into the sea. These mining dumps are called slag dump in optical mineralogy. Today’s modern ore processing with its capability to extract the metals from these ores reprocess these dumped rocks for their valuable metals. According to some optical mineralogy researches, analysis of these rocks has yielded some amazing new minerals. Some of these minerals were not there when rocks were first mined centuries before but they are present now. It has been found that the sea water altered the low grade lead ores and produced a most unusual assortment of rare minerals such as Nealite. Actually many people do not consider these minerals to be true minerals because their creation was indirectly aided by the actions of humans and therefore not exactly natural. Purist mineralogists argue that minerals must have a natural origin in order to be classified as minerals. However, these minerals were only indirectly affected and the study of their origins is best left to mineralogists.

 

            Mineral Nealite has a bright and attractive color that can be more splendidly exhibited when viewed with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. Nealite is found only in microcrystals and is very hard to obtain for one’s collection. But its beauty, rarity and interesting origin make it a very desirable mineral, especially for micromounters. Nealite is typically found orange or yellow in color that can be more majestically exhibited when viewed under polarizing microscope. When viewed in reflected light of petrographic polarizing microscopes, mineral Nealite is usually found showing vitreous luster. Nealite crystals are commonly found transparent to translucent in appearance. Nealite is also known to crystallize in the trigonal system of crystal formation. The crystal habit of mineral Nealite as described in optical mineralogy usually includes platy prismatic to acicular crystals with a sharp domal termination that can be seen more clearly visible when specimen is evaluated with the aid of polarized light microscopes.

 

            Mineral Nealite is most commonly found with absent cleavage even when it is closely evaluated with the aid of petrographic polarizing light microscope used in the field of optical mineralogy. It is usually found showing uneven fracture when evaluated with the aid of polarizing microscopes for mineralogists. The hardness measure of mineral Nealite when it is evaluated using the Mohs scale method is usually 4. Nealite is also most commonly found leaving a pale orange yellow streak when specimen is rubbed on a white porcelain streak plate. The specific gravity measure of the mineral Nealite is approximately 5.88 grams per cubic centimeters, which is considered well above average for translucent minerals. Nealite crystals are also found brittle. The best field indicators of mineral Nealite include color, crystal habit, locality, high density, and brittleness. Nealite is commonly found associated with paralaurionite, georgiadesite, and other rare lead slag minerals. Nealite has limited occurrence to its type of locality at Lavrio, Greece.



Author:
Time:
Friday, May 15th, 2009 at 3:16 am
Category:
The Phosphates Mineral Class
RSS:
You can follow any responses to this entry through the RSS 2.0 feed.
Navigation:
Click Here For Best Selection Of High Quality Polarizing Microscope