How to ennoble topaz?

As it is known, natural untreated topaz generally has a rather poorly saturated color. To obtain bright blue, blue and ultramarine flowers, the stone is subjected to various methods of exposure. The most common of these is radiation. It is used as the only method or in conjunction with heat treatment. The result of these types of refining is getting topazes Sky, Swiss and London blue colors, which are quite resistant and only slightly fade when exposed to sunlight.
Another less common and cheap method of topaz refining is coating on its surface. The use of this method allows to paint topaz in any color of the rainbow. However, the disadvantage of the coating is its fragility and, as a result, its rapid erasure from the topaz edges.

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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.