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Interesting minerals of charoite rocks. Daliith-Delai
Among the accessory minerals of charoite rocks, there is such a mineral as dalyite, named in 1952 in honor of the American petrologist Reginald Aldworth Daly (1871-1957). The mineral in the predominant mass has a fine-grained dimension and is characterized by a colorless or brown color. Delhiite was discovered by mineralogist Rene Tassel (1916-2013) on Ascension Island in the Atlantic Ocean (described in 1952), and the find in charoite rocks of the Murun massif (described in 1982) was the first for the territory of the USSR.
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.