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, that in India there are Hindu masters …

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 (Mountain crystal).

A very large factor …

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 into two parts. This method was used …

Diament

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. Another distinctive feature of a diamond is its particularly strong luster, called …

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, induced by daylight or of a specific wavelength, …

Pleochroizm

Pleochroizm

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. The change in the color of the crystals depending on the direction of vibrations of the light rays is called multicolor, …

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, like a diamond, grenades, spinele i …