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Radiation on the finger
While traveling in exotic countries, you just want to buy an unusual souvenir, or even better, some rarity. But even rare stones, regardless of the price, can be dangerous. So many minerals such as zircon, fluorite and even some garnets can contain significant admixtures of radioactive elements. But such a mineral as ekanite, which contains thorium, can be found in the form of jewelry inserts in the markets of Sri Lanka and India. The mineral can also be found in other countries, including Russia, but in our country it is necessary to look very well for an ekanite jewelry insert. Of course, the level of radiation from a small stone does not kill on the spot, but it is always better to make sure that the stone you are purchasing does not bear, so to speak, "encumbrances" in the form of unforeseen properties.
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.