Stones related to the precious stones are being allocated a beautiful play of colors, brilliance and splendor. We can say that feature some of the mineral can be explained when it is found in natural conditions are rare. Among the special features that make the minerals are distinguished, related to the precious, always taking into account the gloss and hardness, refraction and transparency. Out some stones, which are often referred to as semi-precious or semiprecious to the class. Most of the gems inorganic. However, there are more and organic stones, coral and amber, pearl, and pearls, and even jet (jet).
As a rule, precious stones can be divided into four main classes. The class includes a number of these precious stones, emerald and diamond, ruby (ruby) and diamond sapphire Shining (diamond) is one of the most popular high mineral values. Often, distinguishing feature of diamond is very high gloss and hardness of the unusual. It is worth noting that this is the hardest mineral. In addition, diamond love for - transparency. Properly crafted diamond (diamond) is able to refract and reflect perfectly the light beams falling, which makes the stone known extraordinary shine the brightest. Scarlet Ruby - another mineral that is considered precious, which refers to the first class. Ruby on hardness only slightly inferior to diamond (diamond).
The main characteristic of ruby (ruby) is a bright red tone. Sparkling emerald usually refers to the species beryl, which is characterized by an emerald-green hue. Often color usually gives significance mineral called emerald. The second section, include the following stones as alexandrite or emerald jade. Alexandrite is distinguished by its ability in getting on the rock of different kind of ray of light appears "alexandrite effect" when the rock changes color. It can often be set to cut variety. Translucent and transparent stones are usually granite step, a diamond or other kinds of cutting, but translucent granite double cabochon. Well, when polishing reveals the positive features of the mineral. For example in order to reveal the effect of asterism and 'Hawkeye' is commonly used treatment double cabochon.