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The main indigenous industrial sources of diamonds are kimberlites and lamproites – alkaline-ultrabasic rocks of ancient p ...

We continue the cycle of significant days and people in gemology and mineralogy ...

We are starting a new cycle of publications about great researchers in the field of gemology and mineralogy. ...

From an inexperienced point of view, it may seem that the central part of the East European platform, namely the region of ...

The stone, later called "dianite", macroscopically is a dense rock of cryptocrystalline structure, characterized by bluish ...

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.

Tauson Lev Vladimirovich (October 27, 1917 - November 23, 1989), an outstanding Soviet geologist and geochemist, member of the USSR Academy of Sciences (since 1981).