What is the size of a 1 carat diamond in mm for different cut shapes

The modern world is distinguished by its pragmatism. In it, every thing has a price, so if you want diamonds - the most beautiful stones in the world, you should learn to evaluate them and determine their true value. And for this you need to know what a carat is and how diamonds are measured. Only a professional jeweler can comprehensively evaluate diamonds using the 4C system. It is used to determine the value of a stone by color (color), transparency (clarity), quality of cut (cut) and weight (carat). A person who is far from jewelry art is unlikely to find out how close a new acquisition is to perfection. But anyone can determine the value of a diamond, because the main thing is to know what is measured in carats and the weight of 1 carat.

Since 2002, Russia has had current standards and norms for the evaluation of precious stones. Technically, the process itself can be divided into several stages:

• Assessment of cut quality . Round or oval stones with 17 to 57 facets are in great demand.
• Stone weight.
• Color – from colorless to brown. Here jewelers do not give precise characteristics. As a rule, the epithets “saturated”, “barely perceptible”, “virtually imperceptible”, etc. are used.
• Cleanliness – presence of chips, defects, cracks, etc.

Only after this is the true value of a particular stone determined.

What is carat

Historians believe that stones were measured in carats already in ancient times. But initially they used the seeds of a cereal plant, which had approximately the same weight.

Gradually, the seeds were replaced by a coin weighing 24 Ceratonia. It was used during the reign of Emperor Constantine in ancient Greece. It is worth assuming that it was the ancient Greeks, in an effort to find the answer to the question of how to find out how much certain stones weigh, who initiated the emergence of a new unit of measurement.

Until the 19th century, there was no single equivalent to the carat. The generally accepted meaning was established only at the beginning of the 20th century. To this day, a metric carat is equal to 0.2 grams.

How much does a one carat standard diamond weigh? This is traditionally 200 milligrams, the same 57 sides and a diameter of 6.4 mm. The stone sparkles brightly in the sun. The ability to refract light rays is called brilliantity.

A 2-carat solitaire is visually almost indistinguishable from a one-carat solitaire. The main difference is the price. It costs much more, since its diameter is 8.2 mm, and the play of light becomes inimitable. Large diamonds are used in designer items more often to order.

High-precision carat scales can help determine the mass of tapeworm. You can also determine the carat of a diamond by size using a simple analysis of parameters. You need to understand that the carat weight is related to the cut shape. It should be taken into account that the weight of the stones is not a decisive factor in the matching of sizes.

Most often, jewelry craftsmen give diamonds a round shape. It is believed that with this cut, the solitaire has more opportunities to demonstrate the play of light.

This is interesting

In ancient times, carob seeds were called carats. They differed little in size, so they were used as a unit of measurement. In the past, different countries had very different carat standards. In the Middle East, a carat weighed 204 milligrams in the metric system.

There was a so-called Arabic carat, it was equal to 223 mg.

And in Egypt it weighed 195 mg. In the UK, until 1988, a carat weighed 205.4 mg, which differed from the carat standard in Europe. This fact drove jewelers to despair.

The metric carat was officially adopted in 1907 at the Congress of Metrologists. Not immediately, but most jewelers appreciated the new standard. Until 1914, it was accepted in most European countries, as well as in the USA and Japan. In 1922, the carat was introduced into the USSR as a measure of weight.

About the relationship between parameters - tables

Let's look at the size and weight of a round diamond:

Diameter, in millimeters	4,1	5,1	6,4	8,2	9,4	10,4	11	14
Weight	0,25	0,5	1	2	3	4	5	10

Square-shaped solitaires are called “usher” and “princess”. Using the table, you can easily understand how to determine the size of a diamond in carats in this design:

Diameter, mm	3,3	4,45	5,55	7,05	8,05	8,85	9,5
Weight	0,2	0,5	1	2	3	4	5

Exclusive shape specimens have the greatest error. The table shows data for a 1 carat diamond depending on its shape.

Form	Marquis	Heart	Oval	Emerald	Pear
Dimensions	9.8x5.6	6.7x6.5	7.7x5.9	6.4x4.9	8.6x5.8

Diamond weight

A girl's best friend is diamonds! Cut diamonds are popular all over the world. There are many tables for determining their weight without special measuring instruments.

How to determine how much a diamond weighs if you know the size in mm

The weight of diamonds, like other cut stones, is calculated using tables. To measure them, they do not use ordinary rulers, but special ones, with divisions in fractions of millimeters.

Since often a gem does not fit exactly 2 or 4 millimeters in size, it can have a dimension of 2.1 and so on.

The type of cut is also taken into account when calculating the weight of the stone:

1. For a round cut, multiply the height of the diamond by the diameter of the girdle squared and by a factor of 0.006.
2. For a heart cut, the length is multiplied by height, width, length and a factor of 0.0059.
3. For the pear cut, the formula is similar to the heart cut.

The coefficient changes, and it depends on the ratio of the length and width of the processed stone. To simplify counting, there are various tables that will help the owner quickly calculate the approximate weight of a diamond.

One carat diamonds

Such a diamond is considered a large stone. So, 1 carat is how many grams? 200 mg is a generally accepted value. For a processed diamond, a weight of 200 mg is considered so significant that 1 carat of diamond (price in rubles) can reach 25 million. A 1 carat diamond, the price of which is significantly lower, may turn out to be of poor quality or counterfeit.

A low quality diamond can be bought for 60,000 rubles; the better the quality, the higher the cost. Diamonds over 1 carat are considered premium stones.

The cost of a diamond can also be affected by its shade; the most popular stones are transparent, without color impurities. Do not forget that 1 carat of diamond does not guarantee the same value for all diamonds, since there are other criteria.

What is 1 carat diamond:

Diamond weight table

What is a carat of a diamond? As with other gems, this is a measure of weight. Diamond carats table:

The price of a 1 carat diamond: what it depends on

Determining the mass and diameter indicators is not enough to indicate the final cost. Quality also matters. A tapeworm that best meets the requirements for the main parameters is more expensive. The price of some specimens of just 1 carat amounts to several thousand dollars. Stones with minor defects and the same parameters will cost two or even three times less. A stone with serious damage can be purchased for no more than $1,000.

In the jewelry world, it is practiced to evaluate stones in accordance with an established system, it is called 4 C. The following indicators are taken into account:

• color (color) - associated with the components included in the composition, is preserved and does not change over time;
• cut level;
• purity is analyzed at 10x magnification;
• mass (carat).

The final assessed value is added up according to Tavernier's rule. Use a calculator to calculate. Use it to multiply the carat cost data with the square of the weight. You can follow a pattern: a 2-carat solitaire will be twice as expensive as a one-carat diamond, and a 10-carat diamond is 100 times more expensive than a one-carat diamond. Large exclusive specimens of more than 20 carats are very rare. All of them are kept in private collections, museums, and put up for sale under their own names.

How many grams in one carat

When assessing the purity of a precious metal, the consonant term karat is used instead of carat. Abbreviated as "K". The amount of precious metal is determined by converting gold carats to grams based on thousandths of a metric sample.

The formula is written as “a/x = 1000”, where x means the metric standard, and a means the carat system.

The ratio of gold per kilogram of alloy after conversion to grams:

• 375 g - 9 K;
• 500 g - 12 K;
• 900 g - 21.6 K;
• 585 g - 14 K;
• 916 g - 22 K;
• 958 g - 23 K;
• 990 g - 24 K.

The jewelry carat weight for gems is 200 mg or 0.2 g (1 g is 5 times heavier than 1 carat). It is written in whole numbers with the obligatory indication of thousandths after the decimal point. That is, in the price tag a crystal weighing 1 ct is marked with the number 1,000 ct, at 1.55 ct they write 1,550 ct, at 0.5 ct - 0,500 ct.

Round Diamonds – How to Divide them

Round diamonds are grouped according to the quality of their finish. These can be group stones:

1. A – flawless specimens;
2. B – high rating;
3. B – rating “good”;
4. G – means “satisfactory”.

The large solitaire with a high level of finishing shines especially brightly. In turn, small diamonds play with light almost imperceptibly. Round solitaires, unlike square and fancy-shaped stones, in addition to powerful brilliants, have sparkle, for which they are valued higher. Such solitaires attract attention, shimmering with all the colors of the rainbow and emitting an inner glow.

Karat - metal purity (Kt)

The term "karat" is also used to measure the purity of gold, although it is worth noting that it is mainly used in the West. In Russia, the concept of “sample” is most often used. The number of carats (or carats) can be 6, 9, 10, 14, 18, 22. 24-karat gold is also possible, but in reality this is almost impossible to achieve - there is always a minimum percentage of impurities. That is, when we talk about measuring gold in carats, it means the level of impurities in the metal. Ultimately, it is these impurities that determine the color of the metal: whether it will be red gold, pink or, for example, white.

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How is the number of carats calculated?

If 24 carat metal (999 fineness) is taken as the standard, then 18 carat gold contains 18 parts of precious metal, and 6 parts are various impurities. If we divide 18 by 24, the result is 0.75. That is, 18-karat gold corresponds to 750 purity. Accordingly, 14-karat gold (14/24) is equal to 585, despite the fact that the division result is 0.58 333 333 333.

Ligature in precious metal

A ligature, that is, an impurity that is added to a precious metal, is used to improve the properties of the product. Basically, the following additives are used:

• Platinum . Adding it improves the appearance of the product, adding whiteness to the metal, and increases its value.
• Nickel . Increases wear resistance and castability. The final product has a pale yellow tint.
• Copper . Increases the malleability of the metal, and the product acquires a reddish tint.
• Palladium . Like platinum, it improves the appearance and significantly increases the cost of the product.
• Silver . Helps improve the malleability and ductility of the metal, reduces the melting point and changes the color range.

How and with what to wear correctly

Having a diamond, even the largest and most beautiful, is not enough to truly shine, attracting the gaze of others. There are certain rules when wearing a tapeworm. The larger the diamonds, the less they need proximity.

In the 21st century, there are no special requirements for wearing gemstones. The main thing is that it is beautiful, stylish, elegant. A young lady can safely wear a large diamond and no one has the right to judge her for it. However, it is believed that large stones suit mature people, while young creatures can only emphasize the natural beauty and naturalness with diamonds of 0.5 carats, one or two carats.

1. The ideal tandem is diamond and platinum or white gold. Noble metals harmonize with the sparkling surface of the stone, emphasizing the ability to play with light. Yellow gold and red metals visually give the stone a yellowish appearance, which is not always effective.
2. The larger the diamond, for example, 3 carats, 5 or even 10, the simpler and lighter the setting should be. In this case, nothing will overshadow the stone, and the overall impression of the composition will not be spoiled by the illusion of bulkiness. A combination of natural solitaires with fur and the same natural fabrics, for example, silk or satin, is considered successful.

3. Jewelry with diamonds does not combine at all with any jewelry or sparkling decor. Such combinations are a sign of bad taste. Sparkling solitaires should be the only similar element of the look and be complemented only by jewelry with the same stones in the form of elegant sets.
4. The combination of sparkling stones with dark-colored clothing is considered the most advantageous, with the exception of purple.
5. It is not recommended to combine a ring with a precious stone with other rings. The exception is a modest wedding without a stone. Earrings with 1 carat diamonds can be worn in everyday life. It is better to save large stones in jewelry for special occasions.
6. A necklace must be worn with a neckline and exclusively as the main element of an evening look. There are certain rules for wearing diamond-encrusted brooches. They will ideally complement a monochromatic outfit and are suitable for creating a spectacular everyday or festive look.

Did you like the article? Tell your friends on social networks how to correctly estimate the cost of a stone and how the carat relates to other parameters. Check out some useful tips on how to wear sparkling diamonds without looking vulgar or, conversely, getting lost in the crowd! See you again!

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How to compare stone prices

There are criteria for determining the cost of a stone:

1. Shade and color. Color intensity can greatly influence the price of a gem. Stones that are too dark or light will be lower in price; admixtures of different colors also reduce the cost. The most valuable stones will be those with deep, bright shades.
2. Processing (cut, shape). The type of cut reveals the stone's ability to play with light. The better the work is done, the more the gem will shine and the more valuable it will be.
3. Transparency. Natural stones are rarely completely free of defects; the most transparent ones are an exception and are sold at auctions at high prices.
4. Size and weight. This criterion affects stones of good quality more; for low-grade gems, size matters much less. The size may be different for stones of the same weight, but it is the mass that plays a big role. The cost of a good diamond of 0.25 carats will be about 160,000 rubles, and 0.5 ct – already about 300,000 rubles.

Attention! Expensive stones must have a quality certificate.

Why are gemstones measured in carats?

Diameter to weight ratio

But is it possible to determine the mass of a stone based only on its diameter? If this applies to round stones, then yes. Thanks to their shape, you can determine their weight in grams by measuring their diameter. There is a special table that shows all the data regarding the weight of the stone and the specific size. We will provide only some information on this issue. For round stones there is the following weight estimate:

• One millimeter is five thousandths of a karat.
• Two millimeters – three hundredths of a car.
• Three millimeters is one tenth of a carat.
• Four millimeters – twenty-five hundredths of a karat.
• Five millimeters is half a car.
• Six millimeters – eight tenths of a carat.
• Six and a half millimeters - one carat.

As the diameter of the girdle increases, its weight will naturally increase. Although the weight depends on the diameter, with different cuts it will be different for the same type of gemstone. Thus, with a “princess” or “oval” cut, the consumption of waste material will be less than with a round cut, so they are more profitable from a material point of view. It also requires less effort from the jeweler.