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Amber in apples
Last August was not generous with the finds of large amber nuggets, but towards its end, on the eve of the Apple Feast, this summer month also pleased amber miners with a large nugget. The weight of the stone was 1184 grams. The nugget has a shape in the form of a bread crust, the color of the stone is uneven from orange-yellow to greenish-yellow. The only drawback is a few large cracks that pass through almost the entire stone and worsen its technological characteristics. But nevertheless, as a unique natural formation, this stone occupies an honorable place in the galaxy of nominal amber nuggets.
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.