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A little about the "orchards" in the world of stones
First of all, when we talk about the names of stones associated with the world of fruits, pomegranates come to mind first of all - and this, of course, is a true association. Pomegranates got their name from the associative perception with the grains of the pomegranate fruit. But tangerine pomegranate or tangerine pomegranate - what kind of "fruit" is this? We tell. The name mandarin garnet was first applied and then became the official trade name for a bright orange spessartine garnet (at least 70% spessartine minal) from Namibia (Kunene region). Then, as bright orange spessartines were found in other regions - Nigeria, Kenya, Pakistan - this name was also used for garnets mined in these regions, as well as in a number of others. The most desirable among orange spessartines for lovers and connoisseurs of jewelry stones are still "mandarin" garnets from Namibia.
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.