37 blue gems

June 17, 2021

Varieties of precious stones and their names are a topic for literally all times. No matter how enlightened the 21st century may be, the debate about what is considered the most valuable gems and what is only suitable for cheap crafts still does not subside. It is not for nothing that minerals are compared to stars - the glory of some burns for millennia, accompanying humanity, while others fly by like a comet with breaks for long oblivion, but they all personify the beauty of the natural depths.

We have prepared a lot of material for you, what kind of precious stones there are, how much the most expensive gems in the world cost, and how to distinguish natural minerals from skillful fakes.

What determines the cost of a stone?

Today, there are five criteria that directly affect the price of a crystal.

Weight

The most obvious point is that the heavier the stone, the larger it is, the more expensive it is. The main unit of measurement is the carat, equal to 0.2 grams. Next, the average market tariff is included in the calculation; here, each mineral has its own “critical” mass. For example, you will not find jewelry with a diamond even half a carat in a regular store, because its cost will be around 500 thousand rubles, but for a ruby this weight or even more is considered the norm.

Color

Jewelry making is a strict compliance with standards; it is not for nothing that everything associated with a noble profession is considered synonymous with precision. This approach also affected the shades of stones, where 14 colors were taken as standards, except for transparent, which is indicated separately:

Green;
Red;
Yellow;
Black;
Pink;
Orange;
Grey;
Blue;
Blue;
Violet;
Brown;
Black;
White;
Multicolor.

It should be understood that it is not only the color palette that determines the value. Maximum compliance with the standard is also important. When the shade of cut raw materials is too light or dark, its value decreases, which is good for the buyer, but not for the master jeweler.

Ennoblement

The vast majority of stones, except for transparent ones, end up on store shelves with “pumping” of color, that is, ennobled. This word refers to laboratory procedures, the purpose of which is to bring the blank of future inlay into conformity with its presentation. There are 5 common methods actively used by manufacturers:

Heating is technologically simple, when pre-cut stones are placed in a special furnace, where they are heated to extreme temperatures. This allows you to even out the shade, make it more saturated or, conversely, mute it.
Diffusion is an advanced heating method in which each workpiece is pre-coated with ions of a particular metal that serves as a color catalyst. After cooling, the transformation of the shade remains for many years or forever.
Sputtering is a technology that gave birth to the famous mystic topaz, which has the effect of an iridescent kaleidoscope. It was invented in 1993 in the USA, when a special film of titanium composition was applied to the surface of the mineral.
Irradiation – radiation allows you to change and “tweak” colors throughout the rainbow spectrum, the main thing is to correctly calculate the dose. The downside is the need to keep processed gems in sealed lead capsules for months.
Glass filling - more precisely, a special type of crystal is used, which hides physical defects, voids and cracks without damage. According to Russian GOST, up to 50% of the volume is allowed; if more, the stone receives the status of composite.

As you might guess, crystals with minimal changes are valued more than others, but they are found extremely rarely in nature, and in the case of rubies or sapphires they are simply on the verge of fantasy. It is important for the buyer to remember that even an ennobled gem continues to remain precious, and minor interventions do not in any way affect its beauty.

Purity

The most controversial parameter, since many experts call the so-called inclusions in the structure of a mineral perhaps the main criterion of authenticity. Heterogeneity is inherent in any natural element, but jewelry precision requires the strictest classification, so there is a gradation of purity that divides stones as follows:

Group 1 – the maximum possible shine and transparency, flaws in the structure are visible only under an electron microscope or a strong magnifying glass.
Group 2 – there are subtle defects that can be seen with a household office magnifying glass.
Group 3 – inclusions visible to the naked eye, slightly dimming transparency and optical effects.
Group 4 – fairly large flaws, gloss significantly lower than the standard.
Group 5 – the crystal structure is damaged, cracks and cavities are present, serious refining is required.

Depending on the manufacturer, a code is indicated on the jewelry tag, most often in the form of a decimal fraction. It should be read with the resulting number so that it is as close to the whole as possible. For example, 3/1 means exceptional quality, pure inlay, but 3/6 results in 0.5 - we have a low-grade insert, close to the fifth group.

Cut shape

It’s relatively simple here - automation of production bases has made life easier for many jewelers, however, intricate shapes still require painstaking manual labor. The following styles are considered popular among buyers, regardless of the category of stone:

Circle;
Square;
Baguette;
Cabochon;
Oval;
Heart;
Marquis;
Princess;
Pear;
A drop.

Of course, there are a dozen patented cuts - Antwerp rose, happy, magna and many others. Each of them reveals the iridescent brilliance of the gem in its own way, but no one has canceled the rule of labor costs - the more complex the composition, the more expensive the results.

Assortment of cuts

The most common gemstone cuts in jewelry are:

circle;
oval;
pear;
marquis;
baguette;
square;
octagon;
trillion;
heart;
polyhedron.

The circle is the most common cut shape, as it allows you to get symmetrical inserts that transmit light perfectly. The standard round cut is the brilliant cut, with 57 facets per stone.

Large minerals are often cut with an oval, creating wedge-shaped edges on them. This cut became popular only in the 60s of the last century.

Despite the name of the pear cut, stones processed in this way externally resemble drops, in which the upper surface is smooth, and the play of light is provided by the side wedge-shaped faces.

Marquise is a grain-shaped cut with pointed corners. With this method, the length of the stone is half its width, and it can serve as an insert not only for rings, but also for pendants and earrings.

Baguette is a type of rectangular step cut. With such processing, not only the advantages, but also the disadvantages of the stone become noticeable, and the quality of the mineral is especially important.

Square is a step cut with equal length and width. Stones of this shape are used in jewelry both as a central insert and for framing.

Octagon is an octagon-shaped cut of a stone, often called emerald. This shape is suitable even for fragile minerals, preventing damage and chipping, but at the same time perfectly demonstrates their purity and color.

Trillion is a cut in the shape of a triangle. The number of facets on a gem depends on the characteristics of the stone and the design of the future jewelry.

Heart is one of the most complex and expensive cuts, often used for exclusive jewelry. The quality of the cut is determined by the evenness of the contour of the finished stone.

Polyhedron is a type of cut in which the mineral is given the shape of a five, six, or octahedron. This treatment is often used for semi-precious stones set into voluminous jewelry.

The best way to imagine what a particular gem looks like with different cuts is to look at photos of the gems.

Types of precious stones in jewelry. Top 5 minerals

To be fair, it should be said that according to Russian laws, only five stones have the right to be called precious, based on the main criteria. Another thing is that they are periodically joined by varieties of semi-precious gems, but more on them a little later.

Diamond (diamond)

The standard of natural purity and the most expensive stone in percentage terms. Jewelry with diamonds has been considered an elite segment of the entire jewelry market for several centuries - they are used to encrust romantic engagement rings, and pendants and pendants with shiny diamond scatterings are usually called a royal accessory. Needless to say, absolutely all manufacturers strive to create their own diamond catalogue.

Sapphire

Blue, like a warm, gentle sea - such epithets are most often heard about sapphires, which in structure are one of the varieties of natural corundum. The fact that 99% of retail stones are refined before further production does not in any way affect their physical properties. Moreover, very little of them are mined in Russia, which directly increases the price, which includes delivery from Asian countries and examination costs.

Ruby

This is the name of precious corundum of red-raspberry color, which in nature can be very pale, but after refining, like sapphire, it receives a new life. The romantic name of the most popular shade on the market - pigeon blood - has not caught on here, but every store has an extensive catalog of jewelry with rubies. The most expensive crystals are those containing rutile - it gives the starry effect so beloved by ladies.

Emerald

Beryl dioxide, a grass-green hue with an admixture of silicon and aluminum, better known as emerald, is a favorite of millions of women around the world. It is no coincidence that Victor Hugo gave the Spanish name of the mineral as a name to the beautiful Esmeralda - the enchanting, mysterious and attractive power of this stone needs no introduction. The cost is due to small proven reserves - 95% are mined in Latin America.

Alexandrite

The rarest of all stones mined in Russia is named in honor of Emperor Alexander II. Its calling card is the unique physical property of the “chameleon”, which changes the colors of the crystal in a wide range from green to lilac. To understand the value - in order to find 100 grams of alexandrite suitable for further jewelry work, 97.3 thousand tons of stone are processed annually.

The laws of the Russian Federation include certain types of sea pearls grown in natural conditions, as well as amber, as non-mineral precious stones. True, to get into the “elite club”, a solar nugget must be more than 1 kilogram of pure mass, and also contain samples of prehistoric fossilized fauna and flora.

Hardness

Precious stones for a woman are jewelry, but often not only their beauty is important, but their practicality, which depends on the quality characteristics of the mineral. The hardness of stones is measured using the Mohs scale. As a standard for the scale, 10 minerals of varying intrinsic hardness are used, with which all other stones are compared. The indicator is assessed in points.

Gemstones can be scratched by minerals with a higher Mohs hardness scale. A diamond is considered the hardest gem.

Top 10 most expensive stones in the world

It may sound ironic, but the most valuable minerals are never used in mass jewelry production; a simple buyer is unlikely to ever be able to see them on store shelves. The reason is banal - they are so rare in nature that literally every gem obtained is sent to natural science museums or private collections.

First place. Red Diamond

Price for 1 carat – from $1,000,000

The undisputed record holder is the carbon compound that forms a blood-red diamond crystal. In the entire history of mankind, only 30 nuggets have been found, 70% of which have a nominal weight of less than 1 carat. Each auction with such a lot is truly a world event, and the starting price tag of a million US dollars will seem like a mere trifle compared to the total amounts for which they are sold.

Second place. Taaffeit

Price 1 carat – $35,000

If the Austrian gemologist Richard Taaffe had not sent a piece of faceted spinel of a strange dark purple color that he found in Dublin in 1945 for examination, we would never have known about his name stone. This compound is unlike any known mineral, and its unique hue, coupled with its natural rarity, found exclusively in China, has made it one of the record holders for jewelry value - twice as expensive as a diamond.

Third place. Grandidierite

Price 1 carat – $20,000

The turquoise heart of Madagascar almost stopped beating when the last vein, discovered before the First World War, dried up in the sixties. This largely determined the high cost of blue stones with a unique pearlescent sheen inside. Today, on the southern tip of the African island, 2-3 nuggets are mined per year, each of which receives a certificate of authenticity for further cutting and inlay.

Fourth place. Serendibit

Price 1 carat – $18,000

The Serendib mineral, which received the Arabic name of the island of Sri Lanka, began to be mined back in 1902, but over the course of a century it was possible to find hardly more than a couple of dozen stones. At first glance, it is a coal-black crystal, but when bright sunlight hits it, a bright blue, greenish or yellow light “lights up” inside. For its “alien” texture, it earned a truly magical reputation and a market value that is 20% more expensive than a diamond.

Fifth place. Red beryl

Price for 1 carat – $10,000

The pride of Utah made several generations of prospectors multimillionaires until Bixbite, as the Americans call it, was discovered in southern New Mexico. Nowadays, the rarest shade of beryllium silicate is found much more often than 20 years ago, but its cost does not yet appear to decrease. The most valuable examples are deep purple stones; the blood red hue is more affordable, but still cannot be found outside the United States.

Sixth place. Musgravit

Price 1 carat – $6000

A relict mineral from Australia, whose homeland is the mountain range with the gloomy name Musgrave. According to the molecular formula, it is an oxide compound of magnesium with beryllium, which gives three natural colors - gray-transparent, olive green and lavender. It rightly tops the ratings of the rarest jewelry minerals - over its half-century history, only 15 pieces of jewelry inlaid with this stone have been officially registered.

Seventh place. Benitoite

Price 1 carat – $4000

California sapphire, as it is informally nicknamed by connoisseurs, is mined in the only deposit on the planet, located near San Benito County. The structure is barium silicate with strong inclusions of titanium, due to which a unique deep shade of blue is obtained. Another interesting property is the fluorescent effect, which is activated by direct exposure to ultraviolet light and lasts for at least several hours.

Eighth place. Poudretteite

Price 1 carat – $3000

Very little is known about the mineral, except that it received its name from the surname of the owner of the mining company, the only mines of which are located in Canada and Myanmar. This is an extremely fragile crystal, famous for its “glamorous” color palette - from pastel purple to bright pink, almost never found in nature. Since 2000, a little more than 30 nuggets suitable for further cutting and sale have been found.

Ninth place. Fire opal

Price 1 carat – $2500

Unlike regular semi-precious silica, its hyacinth-colored counterpart boasts exceptional transparency, which determines its high price. It is known for certain that the rings of Roman emperors were decorated with fire opals. The tradition passed on to monarchical Europe - Napoleon Bonaparte adored such stones and even gave his wife Josephine a faceted masterpiece worth 30 thousand Venetian ducats in gold.

Tenth place. Eremeevit

Price 1 carat – $2000

The first stone, named after the great Russian mineralogist Pavel Eremeev, was found in the Transbaikal mines at the end of the 19th century, but it received a detailed scientific description only 70 years later. This is a unique aluminum borate compound that has a delicate bluish tint that resembles freshly set ice. When heated, it can change color to green, but as soon as it cools down, it returns to its original appearance.

Types of semi-precious stones

According to generally accepted standards, they are grouped into so-called orders according to their current value among jewelers, natural rarity and unique physical properties. If we take the five unconditionally precious minerals as the first group, the list will continue:

Second order - aquamarine, amethyst, zircon, topaz, beryl, opal.
Third order - rauchtopaz, garnet, rock crystal, turquoise, tourmaline, peridot, citrine.
Fourth order (precious stones) – jasper, malachite, onyx, obsidian, jade.

The main nuance that corrects domestic classifications is the prevalence of a particular mineral in a particular region. The most striking example here is Karelian shungite. We make entire tabletop sculptures 10 centimeters high from it, but in Latin American countries the exotic stone is sold at the price of an amethyst or even a garnet.

How to distinguish stones from fakes?

Each mineral, both precious and semi-precious, has its own set of fairly simple rules that are guaranteed to distinguish them from synthetic imitations:

The main “tester” of diamonds is bright sunlight, which the diamond structure does not refract. Try to look through the insert at the sun, you will see only a tiny dot, or put a pebble on a piece of paper with text, the letters will become indistinguishable.
You will have to look carefully at the emerald through a magnifying glass. Today, even large jewelry brands save on refining, so a cobweb of a veil almost always forms inside a green crystal - microcracks due to sudden overheating.
Ruby, even after leveling the shade, should not be too bright - raspberry-red color is considered the standard. Deviation into dark tones indicates the presence of a large percentage of impurities, and excessive pallor indicates low quality corundum.
Sapphires have recently become extremely difficult to distinguish from synthetic analogues, but there is one reliable way. Always pay close attention to the uniformity of color. In natural refined stone it is heterogeneous, but without sharp transitions.
A pomegranate is checked, first of all, by its size - if the crystal is larger than a grain of everyone’s favorite fruit, most likely it is glued together from several parts. A neodymium magnet is also useful, as it slightly attracts the burgundy mineral.
They have learned to counterfeit a black diamond with carborundum or cubic zirconia that perfectly imitates it. The light test for a cognac shade is useless, but a 20x magnifying glass will help you see the double edges characteristic of any “synthetics”.
Pearls are tested in two ways. Not squeamish buyers can appreciate it “to the teeth”, because sea peas have a specific crunch due to microscopic burrs. Another method is a regular needle, which will not scratch natural mother-of-pearl.
Aquamarine differs from cheap plastic in its unique optical effect - it slightly changes shade at different angles of refraction. A cat's eye is examined in a similar way - its vertical highlight is strictly even and symmetrical, without kinks.
Rauchtopaz will give itself away with a star-shaped effect, just like an expensive ruby. It appears due to the special molecular structure where rutile is included. In addition, real smoky quartz is never the same - its shades vary.
It will take a long time to check lapis lazuli at home - you need to put the jewelry in a glass of water at room temperature for several hours. If the gem was tinted for richness, the liquid will show this perfectly.
Amethysts instantly reveal a fake under the light of an ultraviolet lamp - in this spectrum the stone should become completely colorless. When the shade becomes even darker than in the sun, we see a roughly colored piece of quartz glass.
Citrines also very quickly confirm their authenticity, thanks to a temperature test - carefully warm it with the flame of a lighter and watch the color change. As soon as whitish or reddish spots appear, feel free to return the jewelry.
Solar amber does not need to be set on fire - just vigorously rub the surface with a woolen cloth for a few seconds. Strong electrification is a good sign. In addition, when kept in warm hands for a long time, high-quality amber does not have stickiness.

The most counterfeited stone in the world, no matter how strange it may sound, is Egyptian turquoise, which is gradually becoming rare in its homeland due to centuries of uncontrolled mining. A real pebble is similar in structure to marble - rough, with obvious contrasting veins and specks. A polished glossy surface is found only in cheap composite jewelry, which is assembled from ground pressed residues.

The main reason for the appearance of color

In the photo: top red ruby, 4.06 carats, Burma
The main reason for the appearance of color is the ability of the gemstone to selectively absorb light rays from the white light spectrum. The main components that shape a person’s perception of color are light, stone and the observer himself. White light contains all spectral components (i.e. all the colors of the rainbow).

Each color corresponds to a specific wavelength. When the light reaches the stone, part of the spectrum of white light is absorbed, and the totality of the light waves passing through the stone returns to the eye of the observer and causes the sensation that he sees. If a gemstone completely absorbs all wavelengths, it will appear black. If it completely reflects (or transmits) light, then it is perceived by the observer as white or colorless. A stone that absorbs light only at certain wavelengths appears to be a specific color to the observer.

Example

Let's look at this with an example. We perceive the color of a ruby as red, because... The stone absorbs green, blue and violet rays from light, and transmits only red, orange and yellow ones. When the rays passing through the ruby reach the eyes of the observer, the human brain combines them and interprets them as red.

Interesting facts about gemstones

Let's check if you know:

The high price of a diamond is not only due to its natural rarity. Almost 80% of all mined crystals are simply unsuitable for jewelry. They are sent to industrial needs for the manufacture of drills, glass cutters and other tools.
Colombia is the world leader in emerald mining. Explored reserves are estimated at record levels, approximately 20 tons of ore per 1 carat of raw material suitable for production. There are only three mining towns - Muzo, Chivor and Cosques.
Saltwater pearls, contrary to popular belief, can grow in huge quantities inside a single shell. Thus, some varieties of Indian Ocean mussels contain from several dozen to hundreds of pearls of different diameters.
Sapphires and rubies in Rus' were called the same - yakhont. The people's love for them was so great that the word yacht became synonymous with impeccable beauty.
Topazes owe their name to the island of Topazios, which once belonged to the Egyptian queen Cleopatra. Ironically, chrysolites were mined there.
Amethyst is called a stone of sobriety by adherents of mysticism. This came about due to an erroneous translation from Greek, where “metistos” means a drinking person.
The only continent where there are no proven reserves of precious stones is Antarctica. However, according to international protocols, any mining is prohibited there.

Our country is the largest exporter of diamonds, occupying almost a third of the world market. Diamonds made from Russian raw materials enjoy the highest prestige among leading European jewelry houses. Belgium alone annually purchases stones worth over 1.3 billion euros, the second importer being the United Arab Emirates.

Treatment

Initially, the mineral looks absolutely unattractive, and only a master in an ordinary fragment can discern the beauty of the gemstone.

Without exception, all gems are processed in two ways:

tumbling;
cut.

The type of processing is selected according to the type, hardness and size of the mineral, as well as its purity and optical characteristics.

Stones are turned into cabochons using the tumbling method. Tumbling is considered the oldest type of processing of precious stones. This processing method is suitable for translucent and opaque minerals: turquoise, cat's eye, onyx, charoite, malachite.

The result of tumbling (grinding and thorough polishing of the mineral) is a streamlined, smooth stone without edges, often with a flat base, with which it is secured in a metal frame.

Cabochons can not only be of different sizes, but also differ in height and shape (flat, convex, concave).

Transparent minerals: sapphire, emerald, topaz, ruby and, of course, diamond, are processed by cutting, giving them a geometric or fantasy shape with a large number of facets that provide the play of light.