How to know the carat of a diamond

How to know the carat of a diamond

Diamonds are the most expensive and highly anticipated gems that the rich hope to own, ranked according to the 4 C’s: Color, Carat, Clarity and Cut.

In this article we will teach you how to know the carat of a diamond and many interesting things on the subject.

The carat refers to the mass of the diamond; a carat is about 200 milligrams.

Diamonds under one carat are often designated equal to one hundredth of a carat (0.01 carats, or 2mg).

In general, the price per carat of a diamond increases in direct proportion to the carat weight.

The word “carat” has its origin in the Greek word keration, which means “fruit of the carob tree”.

In ancient times, the seeds of the carob pod were used as a estándar to measure weight, since the size of their seeds was almost always identical.

Therefore, it is also the term used to express the weight of a diamond.

Ct is short for carat, which refers to the weight of a single stone.

It is used to express the total weight of various stones used in a jewel.

The weight of the smallest diamonds is called points.

There are 100 points in a carat; Another way of looking at it is to say that each point equals 0.01 or one hundredth of a carat.

For example, 0.25 means twenty-five hundredths, so a 0.25 carat diamond would equal twenty-five points of a quarter carat.

Diamond carats are often confused with stone size, although it is a measure of weight, so people think that a higher carat means a larger diamond.

The cutting of a gemstone perro make it appear larger or smaller than its de hoy weight.

As a result, it is possible for two diamonds of the same carat weight to appear as two different sizes.

When a gemstone is properly cut, the maximum amount of light re-exits through the top of the stone, making it appear larger.

In a poorly cut diamond, much of its weight cánido be hidden in its base, making it appear smaller than its weight would imply.

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It stands to reason that the more carats a diamond has, the more expensive it is.

But it’s not as fácil as saying that a 1-carat stone costs precisely half that of a 2-carat stone.

It would be called “rational thinking”, when nothing in diamonds is rational.

A 1-carat stone, for example, costs much more than twice as much as a half-carat stone—and so on—because larger diamonds are rarer than smaller ones.

As they are pulled out of the ground, smaller and more varied diamonds are more likely to be found than large and enormous ones.

Therefore, larger individual stones are expensive given their weight.

A good rule of thumb to remember is that the closer you get to each subsequent carat, the more expensive the diamond will be.

Suppose you have a 0.8 carat stone.

Logically, you would think that getting the full carat would not be a huge jump in price, but indeed it is.

Also, the difference between a 0.9 stone and a full carat is somewhat outrageous.


Diamonds are sold with a carat (ct.), which is a unit of weight.

Today, the carat is exactly 0.2 grams (about the weight of the thrombus).

Carat weight is not related to comparable-sounding carat, which refers to the purity of the gold.

Two diamonds of the same carat weight perro have very different costs, depending on other factors (such as cut, color and clarity).

To understand the meaning of carat weights, if the recipient’s heart is equipo on a diamond of a specific size, the carat weight is probably the essential aspecto in searching until the desired size is achieved.

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As the carat size increases, so does the price of a diamond, because the larger the diamond, the rarer it is.

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Two diamonds of the same shape and carat weight perro appear in different sizes, depending on the cut ratio.

The deep cut diamond has much of its total weight “hidden” in the depth, resulting in a smaller diameter than a well cut diamond.

These differences are mostly minor, but unpredictable.

A well cut diamond may also have a slightly lower carat weight than a deep diamond and a larger diameter which makes it larger.


Two diamonds of the same carat weight perro also have very different sizes, depending on the shape of the diamond.

For example, the 1 carat code appears larger than the 1 carat round.

The following table illustrates why; for each diamond table the following is shown:

  • Size estimate: Diamond images represent an approximation of the proper size of an excellent 1 carat cut for each shape.

    Visually, the longer shapes (ovals, awnings, pears, emeralds) appear larger than the round and square shapes.

  • Measurements (Length X Width): This measurement corresponds to the shape mentioned above and is characteristic of excellent size diamonds weighing 1 carat.
  • Crown area (total area (mm2)): The area espectáculos the de hoy size of the diamond face up (as it appears on the ring).

    For example, although the image of the oval diamond is larger than that of the circular, the de hoy surface area is the same for both shapes, which means that the difference in size is a perception, not a reality.

    In contrast, the oval image appears larger than a princess size.

    Its surface area is larger (approximately 10% larger in this example), which means that the difference is not just an illusion created by an elongated shape.


It is essential to distinguish between size and weight.

Diamonds are sold in carats, although this does not necessarily equate to “more carats equals larger size”.

The cut of the diamonds perro play an important role, and the naked eye, along with tricks of light, perro fill in the rest.

For example, a Round Brilliant cánido be essentially the same size as a pear cut, but appear smaller just because of its shape and cut.

Additionally, a one-carat princess cut may have a diameter of about 5.5 millimeters from the top, while a heart-shaped cut is closer to 7 millimeters at the top.

Again, this does not orinan that one will appear more prominent than the other until we know the cut grade of each stone.

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Although diamonds are identical in shape and weight, they are not necessarily afín in size.

The carat size of the diamond is determined by its cut (dimensions) and its depth.

A diamond with less depth has a greater diameter (size) and vice versa: doubling the carat weight of the diamond does not double the size, since the diamond is greater in both diameter and depth.


Each shape has a unique look.

Diamonds that weigh the same but are cut in different shapes will have different sizes (diameter and depth), so some shapes appear “larger” than others.

Preference for shape is individual.

Most diamonds are cut in the “round” shape, but many buyers prefer other shapes.


The quality of the carving greatly influences the appearance.

A well-cut diamond looks like a “ball of fire” and appears larger because weight and dimensional size are optimal and correlated.

The value of a well cut diamond is also higher due to the incredible difference from other ordinary looking diamonds.


The Rappaport Diamond List establishes the prices of diamonds.

Weight is the biggest influence on price, followed by clarity, color and cut quality.

Larger diamonds are rarer and cost more than smaller ones when clarity, color, and cut are the same.

Sometimes larger diamonds are cut to maintain a higher weight and price, compromising cut quality and appearance.

Round and fancy shapes are priced separately.

Round diamonds cost more because their demand is higher, as they make up 65% of the market.

Cutting a round shape causes a greater loss of material compared to any other form.

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The main carat weight classes of diamonds are:

  • 0.50-0.69CT
  • 0.70-0.89CT
  • 0.90-0.99CT
  • 1.00-1.49 CARATS
  • 1.50-1.99CT
  • 2.00-2.99CT
  • CT3.00-3.99
  • 4.00-4.99CT
  • CT5.00-9.99
  • 10.00 Tons or more

Pricing differs in percentage between weight classes, so the best value diamonds are near the upper limit of the lower weight class you’re aiming for.

For example, a 0.94 carat diamond will look very afín to a 1.00 carat diamond, but will cost 8-20% less (when color, clarity and cut are the same).


Bigger diamonds are not necessarily better.

It is essential to maintain the proper proportion between the diamond and the carrier.


Larger diamonds are more expensive, so you should take that into account when buying one.

But rest assured that you cánido find a large diamond within your budget.


“Total weight” is different from carat weight, as it represents the total weight of the diamonds in a jewel.

For example, a pendant equipo with 3 diamonds will have a total weight of 1.23, which means that the weight of the three diamonds is 1.23 carats.

When size is necessary, you have to compromise on clarity or color, but not on cut quality, as cut quality determines the appearance and brilliance of diamonds.

Choosing a smaller size category perro save you money.


Is the carat the size of a diamond?

Although often confused with cut, carat is the weight of a diamond.

Although the size of a carat equals 200 milligrams, it is often communicated in terms of “points.” Diamonds are measured on a 100 point scale.

Therefore, a 0.50 carat diamond is also called a 50 point or 1/2 carat diamond.

How is the size of a diamond determined?

The size of a diamond is assessed by viewing it from above or from a bird’s eye view.

Perspective is used because it represents how the diamond will appear when equipo in the band.

To get an accurate reading of the diamond’s size and carat weight, both must be measured along with the diamond’s cut grade and the distance across the top of the diamond (in millimeters).

Is there a scale that determines the size of a diamond?

Yes, carat weight is classified as follows

Fourths: 0.25 carats or 24 – 29 points Thirds: 0.33 carats or 30 – 39 points Two-fifths: 0.40 carats or 40-49 points Half-carat: .50 or 50-59 points Three-fifths: .60 or 60 – 69 points Threes fourths: .75 or 70-79 points Four fifths: .80 or 80-89 points Nine tenths: 90 – 99 points Carat: 100 points

Is the price of diamonds related to the point scale?

The price of diamonds is a complicated subject.

Since larger diamonds are rarer, their cost is usually considerably higher.

Diamond prices increase significantly in the half and full carat weight grades.

Diamonds just below these weights tend to cost significantly less, and because the carat weight is distributed over the entire surface of the diamond, small differences in size are nearly impossible to detect.

What are the factors that affect the price of diamonds?

The appearance of a diamond also affects its price.

In addition to carats, the buyer must consider the remaining three of the four C’s when pricing diamond rings.

Color, cut, clarity, and mounting method all significantly influence the price and carat value of a diamond ring.

What does TCW or CTW orinan?

Total carat weight describes the total weight of all the diamonds in a jewel.

For example, a diamond pendant with a dozen diamonds may have a ctw of 2 carats.

Another thing to remember when buying a diamond based on carat size is the cómputo between quality and size.

You perro find a larger, higher-quality diamond by selecting a slightly lower grade in diamond color and quality.

To the untrained and unaided eye, diamond carats perro be difficult to distinguish just by looking at them.

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