How to read "plotting" correctly?

Plotting is a diagram of inclusions plotted on a schematic plan of a stone's faceting, in which the facets of a stone are depicted in projection onto the girdle plane. Plotting is indicated in gemological reports for diamonds. The orientation of the pattern is determined by the elongation of the cut shape, and for isometric shapes - in accordance with the location of the most pronounced clarity factors. Depending on the location, cleanliness factors (defects) are divided into external (surface) and internal. External defects are indicated by conventional symbols in green, and internal ones - in red. The explanation of the legend used in the inclusion diagram is placed in the immediate vicinity of the diagram - under it or on one of the sides of it. Only significant factors that determine the clarity of the stone, as well as that are an identification feature of the stone, are taken out on the plot. Designations of minor defects are not applied to the plotting; their presence in the described stone is indicated in a footnote under the diagram.

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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.