Diamonds and precious stones must meet several criteria

Diamond has by nature a high refractive index and a high gloss, which is why they traditionally cut as gemstones. Since 20 Century, it was able to carry out modern ground joints, which were the special qualities of diamonds only make the most of, and justify their special value.

This is mainly due to the fact that diamonds have numerous internal light reflection. These can be specifically brought to bear by careful polishing, while the specimens in special circumstances angles to each other must be.

Nowadays, the specimens are simulated on computers and machines to process the stones to achieve the best possible results. Only about one quarter of all diamonds in terms of their quality at all suitable as semi-precious stones, which in turn meets only a fraction of the important criteria of size, the appropriate form and high purity.

Diamonds are handled most frequently in the so-called brilliant, which is by at least 32 facets in the upper part and characterized 24 facets in the lower part. In this procedure, then polished diamonds are accordingly referred to as diamonds.

In addition to diamonds include sapphires, opals and rubies counted among the precious stones. These are cut in many cases also in a crystalline form, as it is convenient for use in jewelry and also offers an attractive appearance.

Depending on rarity, size and purity of the precious stones and diamonds and other processed materials such as gold is measured in effect, then the value of a jewelry piece. Are particularly rare and therefore valuable, for example, so-called "fancy diamonds" in which they are colored diamonds in intense shades such as yellow or green.