Geological classification

What precious stone never loses its value?

The diamond is consistently among the top stones; its value is practically independent of global jewelry fashion trends. This is a diamond that has been processed into a faceted shape. Diamonds are evaluated according to the 4C system: cut, clarity, number of carats, color. Depending on these parameters, the perfection or imperfection of the stone is determined.

Spinel is an incredibly beautiful mineral with a noble shine. It is a mixture of magnesium oxide and aluminum and is distinguished by its richness of shades. In jewelry, spinel is valued for its rare beauty and the ability to create products with an unusual energy field.

Aquamarine is a beautiful natural stone shaped like a hexagonal prism. If you look at aquamarine for a long time, you can feel the breath of the sea. “Aqua” is a loaded prefix, and the whole name can be translated from Latin as “sea water.” For many years it was believed that this material protects sailors from bad weather, bad weather, and dangers. Many people still believe in the natural power of the stone, but aquamarine is still mostly valued in jewelry.

Sapphire is a mineral from the corundum family; all its shades are valued in jewelry, with the exception of lilac-red. The stone is distinguished not only by its beauty, but also by its durability – in this characteristic it is second only to diamond. For many centuries, sapphires adorned the crowns of kings and emperors. This is truly a royal stone, the demand for which remains virtually unchanged, the value of which only increases.

Yellow sapphire is rare and is considered a rare and expensive stone with excellent characteristics. May have a variety of shades and different purities.

Tanzanite belongs to the epidote group of minerals, mined in a small area in Tanzania, and therefore has a high value. The territorial limitation of production causes a large number of fake stones to appear on the world market. But an experienced expert can easily distinguish real tanzanite from a fake: the natural stone leaves scratches on the glass surface, has a specific shine, and when immersed in water, light stripes appear along the edges (refractive characteristics).

Tourmaline is an amazing stone consisting of boron, magnesium, aluminum, silicon, iron and other components. Translated as “stone of mixed colors,” indeed, various shades and variations are found in nature. In jewelry, the blue “neon” variation has the highest value.

Paraiba Tourmaline is a rare stone with a distinctive blue or green color. Its true age is estimated at millions of years, but Paraiba Tourmaline was discovered only 30 years ago. And almost immediately he received high recognition in jewelry. It has a special glow and can scatter light rays. This is an incredibly beautiful stone that you need to see in person at least once in your life!


When purchasing, you should pay attention to the color of the stone – this is the primary characteristic. There should be no cloudiness, abrasions, or unevenness. The color should be deep, uniform, and transparent. A shade that is too dark or too light should raise red flags, and you should also be careful if there is a loss of shine. A quality stone should have perfect color and shine in any light.

As noted above, the cost of the stone largely depends on the color (it determines up to 70% of the total price of the mineral). For some stones, darker shades are more valuable, while for others, lighter shades are more valuable. It all depends on what kind of stone you are considering buying.


The second most important parameter is cleanliness. Why second? Because the stones have different chemical compositions and mature in different conditions and different geological environments. And the crystalline structure does not always make it possible to put purity at the forefront – some stones cannot be transparent by their nature. However, cleanliness and transparency are still important.


The choice of gemstones should be based on the quality of the cut. This is the third most important parameter; the stone’s ability to shine and reflect, scatter, refract light, as well as color saturation, largely depends on the cut. An ideal cut ensures the creation of edges (facets), thanks to which a beautiful shimmer of all passing light is possible and the creation of that very shine for which precious stones are so highly valued.

The stones are different, and the cut is always different too. To avoid the formation of bubbles, inclusions, unwanted inclusions, cavities, when working with a mineral, a cutter can change the proportions, but at the same time trying to maintain the weight and size of the existing natural material.

The weight

The choice of gemstones is also based on how much weight you need. Jewelry uses its own metric unit, the carat, to describe the weight of stones. The more carats, the higher the price.

The difference between a 1 carat stone and a 4 carat stone is not always proportional to the price – it can be tens or even hundreds of times higher. This is due to the scarcity of the mineral on the world market. Products weighing several carats are often produced in a single copy, sold through auctions, and it can be difficult to purchase them, taking several months to purchase.

It is optimal to take a medium-weight stone. Keep in mind that weight depends not only on the size, but also on the density of the mineral. Opal is a light stone, while sphalerite is a heavy stone. Accordingly, with the same weight, the difference in the size of the stones will be significant.


How to choose a gemstone by value?

Immediately outline the financial framework, determine for what purpose you are purchasing a precious stone (investment, production of designer designer products, etc.). If you assume that resale of a product is possible in the coming years, choose an average option that will be in demand and will be easier to put up for sale without resorting to promotional schemes.

If you find it difficult to decide on the parameters, if you don’t want to take risks, entrust the selection of precious stones to the experienced experts of our jewelry house. As part of an individual consultation, you will receive detailed questions and competent recommendations – contact us!

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