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Imitation and synthetics - what is the difference?
Many ordinary people put an equal sign between these concepts, which is a mistake.
Let us turn to the definitions. A synthetic stone is a stone that has identical properties to natural, but has a laboratory origin. That is, natural and synthetic, for example, emerald, have the same composition (with the exception of impurities), hardness, density, optical parameters, but natural was formed naturally through certain natural processes, and synthetic - in laboratory conditions with the participation of man.
An imitation is a stone that is similar in appearance and sometimes in properties to a particular gem / jewelry stone. However, imitation with a simulated stone have no common identical properties. Often, cheaper materials are used as imitations compared to the original.
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.