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Interesting minerals of charoite rocks Jerfisherite - Daniel Fisher
The last of the considered by us minerals, found in charoite and named after geologists, mineralogists and naturalists, is djerfisherite. The mineral is weakly stable under surface conditions. Since djerfisherite is an alkaline sulfide with an additional chlorine anion, it cannot impart decorative qualities to charoite. Jerfisherite in charoitites is rare in the form of insignificant grains and very insignificant quantities. The mineral was named by a mineralogist and meteorite researcher at the University of Chicago (Illinois, USA) Louis H. Fuchs (1915-1991) in 1966 in honor of Daniel Jerome (Jerry) Fisher 1896-1988), professor of mineralogy from the same university and one of the presidents of the Mineralogical Society of America (USA).
В геммологической практике бывают весьма увлекательные случаи с диагностикой ювелирных вставок
Но помимо редкости цвета и высокой стоимости таких камней, многие розовые камни выделяются одной замечательной особенностью – они проявляют плеохроизм, то есть в зависимости от положения осмотра камня он может иметь дополнительные оттенки – оранжевый или пурпурный.
Currently, gemstones are produced by two fundamentally different technological methods - the High Pressure - High Temperature method (“HPHT”, High-pressure & High-temperature) and the Chemical Vapor Deposition (“CVD”, Chemical vapor deposition) method. The "HPHT" method is the most tested classical synthesis method, which can be used both carbon deposition on diamond from flux melts and catalytic reactions. In "CVD" synthesis, diamond growth occurs on a seed during carbon deposition mainly from a gaseous medium at relatively low temperatures and pressures.
Jewelry and precious stones are just such a category of goods, when buying which you need to pay attention to many criteria.
Sogdianite is a rather rare mineral and more often it can be found as a collection material (moreover, in systematic collections), and it is extremely rare in jewelry.