The value and evaluation of diamonds

The value and evaluation of diamonds.

The most important factors, on which depends the value and price of a diamond: barwa, cleanliness (faultlessness), cut quality and size.

The size of diamonds. Kryształy diamentu mają różną wielkość — mogą być one bardzo małe aż

The use of diamonds

The use of diamonds.

In the past, diamonds were only used as ornaments. They were ground with diamond powder, by giving them different forms to enhance the natural shine and play of the diamond's color. Already in the 17th century. the French traveler Tavernier recalls, …

Diamond imitations

Diamond imitations

Apart from the primitive way of imitating diamonds with varieties of glass with a high refractive index, colorless sapphires are used to imitate this most valued gemstone., zircons or topazes, sometimes also transparent quartz …

The physical properties of a diamond

The physical properties of a diamond.

Cleavage. The diamond has a pronounced cleavage parallel to the octahedron faces. This is used for cutting (splitting) and grinding. When the blade applied to the diamond is lightly tapped in the direction of the cleavage plane, the diamond is split on …


Diament belongs to the most valued gemstones. The name of the diamond comes from the Greek word adamas - invincible, what is related to its properties, primarily with hardness, the greatest of all minerals. Inną charakterystyczną cechą diamentu jest

Other optical properties

Other optical properties

Luminescence is called the phenomenon of "cold", i.e.. without increasing the temperature, body glow under the influence of various factors. Depending on the type of source that excites the glow, different types of luminescence are distinguished, like photoluminescence, wywołaną światłem dziennym



In isotropic environments, the absorption of light is the same in all directions. In contrast, in colored anisotropic crystals the absorption depends on the direction, in which the vibrations of polarized rays take place. Zmianę barwy kryształów w zależności od kierunku drgań

Refractive indexes

Refractive indexes.

The refractive indices of minerals vary; this is an important hallmark, allowing the determination of minerals often with very similar properties.

Optically isotropic minerals, i.e.. amorphous, like opal, and crystallizing in a regular pattern, …