What stones are precious, what are their values? These are minerals formed by natural processes, without human intervention. There are over four thousand different minerals, but not all of them belong to this group. Consider which stones are precious and what are their characteristics.

Gem Names

Minerals are appreciated for their beauty, unique colour, shine, purity and strength. An important factor is their uniqueness. Several classifications are used to show which stones are precious. Minerals are divided into:

• Precious stones (jewellery);
• Jewellery and crafts;
• Decorative.

Moreover, the former are divided into four more rows of gems. Under federal law, the first group includes: diamond, emerald, ruby, sapphire, alexandrite, natural pearl. Also, pink topaz belongs to them. These types of gemstones belong to the first row and are the most valuable. In order to find out which stones are precious and which are precious, it is necessary to take into account the degree of their distribution, in the second there are more. Semi-precious minerals do not have such pronounced properties, it is important to pay attention to the description of precious stones.

The colour of the jewels

To find out which stones are precious and which are artificial, there are several factors to consider. So the colour is checked on a pure white list, because each individual type of mineral is purely individual and is the most important characteristic. It is important to pay attention to the detailed description of the natural rainbow moonstone, the uniform distribution of their colour and tone. Raw gems are often characterized by blemishes and blemishes. Artificial analogues generally do not have such drawbacks. Such replacements of expensive jewels have been found in ancient Rome and sometimes only a master can distinguish a real jewel from an artificial one.

The colour of the natural smoky quartz is formed by the inclusion of oxides of various metals (iron, chromium, nickel, titanium).In some minerals, the colour may change when exposed to high temperature. Amethyst, due to the increase in temperature, can change its purple colour to yellow. Topaz fades slightly under the influence of sunlight; the same applies to pearls - dark.

Description of gems

Diamond

The most expensive gem - it's a diamond. The colour often has a very pale yellowish or bluish tint. It consists of pure carbon. A diamond can rightly be called not only the best gem, but also the finest, because no other mineral can be compared to it by its brightness. For a long time, diamond processing caused a lot of difficulties because of its extraordinary power, so it is no coincidence that the name of the jewel in ancient Greek means indestructible. It is known that it is thanks to the cheeks of the jewel that all its best sides are revealed. A faceted diamond (commonly called a diamond) shines throughout the spectrum.

Precious natural london blue topaz of pure translucent colour are the most precious (with the exception of fantasy) and their cost can reach tens of thousands of dollars per carat. In addition, these figures increase significantly with the size of the mineral itself. 12 positions are used to evaluate its purity.