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If you’ve spent time looking in ~ engagement rings and other diamond jewel online, girlfriend may have noticed the acronym “CTTW” alongside other important details such as cut, clarity, color and also carat weight. 

For example, these space beautiful historicsweetsballroom.com because that a 2.18cttw pair the earrings indigenous Blue Nile. That method they are 2.18 carats combined. Or you deserve to look in ~ this really elaborate and also ornate halo setting for an engagement ring additionally from Blue Nile. There are 3.07 carats precious of accent historicsweetsballroom.com ~ above this ring. If you put a 1ct facility diamond into this ring, girlfriend will have actually a 4.07 cttw engagement ring.

What walk CTTW average in a Diamond Ring?

CTTW represents “carat complete weight,” or “total carat weight.” it’s a metric that’s supplied to measure the total weight of every one of the historicsweetsballroom.com in a details piece of jewelry, such together a tennis bracelet or a pavé diamond ring. 

You could see “CTTW” composed as “CT TW” for part engagement rings. CT means “carat,” a unit supplied to measure a diamond’s weight. TW is quick for “total weight” and is used to measure up the complete weight of all historicsweetsballroom.com in a item of jewelry.

The carat load of one diamond and also the full carat load of a diamond ring are an extremely different numbers — a truth that can reason some man for first-time buyers. Below, we’ve defined how CTTW works, and also how it different from other measurements of a diamond’s weight.

CTTW vs. Carat: what’s the Difference?

As we covered in our overview to diamond carat weight, the carat weight of a diamond describes the amount the diamond weighs, not its size. A diamond the a solitary metric carat weighs exactly 200 milligrams and also can variety in diameter native 5.60mm to 6.60mm depending upon its cut grade. 

Carat weight is abbreviation at “ct.” when you’re viewing loosened historicsweetsballroom.com online, you’ll normally see your carat weight noted alongside determinants such together cut, color and also clarity. 

0.47cttw twin Halo

CTTW, top top the other hand, describes the complete weight of all of the historicsweetsballroom.com in a certain piece that jewelry. Uneven ct., which is used to show the load of a loose diamond or facility stone, CTTW is only supplied to display screen the complete carat load of all historicsweetsballroom.com. 

If you’ve read any kind of of our other guides, you might have also seen the acronym “CTW” offered to express to total carat weight. Both CTTW and also CTW space used an international and have actually the precise same meaning.

Many engagement rings just contain one center diamond. Because that example, this knife leaf solitaire setting from James Allen is designed to only hold a facility stone. Together a result, the ring’s complete carat load (CTTW) will certainly be the same as the carat load of the facility stone.

Other rings, such as this lotus basket pavé engagement ring from James Allen, have a band that’s lined with small historicsweetsballroom.com. This certain ring functions 36 small round historicsweetsballroom.com, adding up to a complete carat weight of 0.25 carat without a center stone. 

The full carat weight, or CTTW, the this ring is calculation by including together the carat weight of the pavé set historicsweetsballroom.com and the weight of the center stone. For example, by choosing this 1 carat ring H VS2 diamond native James Allen, the full weight that the setup and center rock is 1.25 carats. 

Some engagement ring settings deserve to have a far-ranging total carat weight even before the center stone is added. Because that example, this grande halo split shank setup from James Allen has a 0.70 CTTW without any center rock due come its 64 pavé and also halo set historicsweetsballroom.com. 

Total Carat weight (CTTW) and also Diamond Prices

The price of a diamond increases significantly with that is carat weight. For example, a sells for $1,243. A 1.00 carat diamond through the same specifications expenses $5,453, regardless of only being twice the carat weight. 

The factor for this is simple. Huge historicsweetsballroom.com are significantly rarer than smaller sized historicsweetsballroom.com and as a result, they can command greater prices ~ above the market. Since of this, a huge diamond is always going to be worth significantly more than a smaller diamond the the exact same quality.

1.15cttw Princess reduced Pave Engagement Ring

This isn’t the case with a ring’s full carat weight. Since this figure is made by including up the carat weight of all of the ring’s little historicsweetsballroom.com, there isn’t one exponential relationship between the ring’s total carat weight and its value.

For example, placed in this solitaire setup from Blue Nile, the 1.00 carat H color, VS2 diamond above costs $5,673 in total. This ring has actually a total carat weight of 1.00 carat. 

Meanwhile, v this 0.50 carat H color, VS2 diamond is easily accessible for $2,763. It also has a total carat weight of 1.00 carat. 

This way that if you’re on a restricted budget, a pavé or halo setup with a fairly high total carat weight but a small center rock could it is in a an excellent idea. While girlfriend won’t acquire the full wow element of a large center stone, a ring the this form can look at beautiful and elegant, every at a lower cost.

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Other determinants to Look because that in a Diamond

The carat load of a diamond — or, in this case, the full carat weight of a ring — is only among several determinants you should take into consideration when you’re choosing an engagement ring. 

Other factors, such as a diamond’s cut, color and clarity, additionally play a function in that is appearance and also value. Known as the 4 Cs, these determinants all connect with each other to influence the way a diamond looks and also the amount you will do it pay for it. 

We’ve spanned these in more detail, and what you should look for, in our overview to buying a diamond. 


CTTW, or complete carat weight, constantly refers come the complete weight of all historicsweetsballroom.com in a ring, bracelet, earrings or other pieces that jewelry. When you’re the town hall a setup on that is own, that the weight of the gloriole or pavé historicsweetsballroom.com. For a complete ring, that the load of all little historicsweetsballroom.com and the center stone. 

Carat weight, i beg your pardon is abbreviated together ct, cw or CW, only refers to the weight of the center rock on the own.

While a ring v a big total carat weight have the right to look impressive, it’s important to remember the the weight of the center rock is typically the biggest element in determining an engagement ring’s value. 

Need help buying diamond jewelry? call our experts and we’ll aid you pick the highest quality loose diamond, engagement ring, bracelet, pendant or earrings for your budget.