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

For example, these space beautiful keolistravelservices.com for a 2.18cttw pair of earrings from Blue Nile. That way they room 2.18 carats combined. Or you deserve to look in ~ this really elaborate and ornate halo setup for one engagement ring also from Blue Nile. There are 3.07 carats precious of accent keolistravelservices.com on this ring. If you put a 1ct center diamond into this ring, friend will have actually a 4.07 cttw engagement ring.

What go CTTW typical in a Diamond Ring?

CTTW represents “carat complete weight,” or “total carat weight.” it’s a metric that’s used to measure up the complete weight of all of the keolistravelservices.com in a certain piece of jewelry, such together a tennis bracelet or a pavé diamond ring. 

You could see “CTTW” created as “CT TW” for some engagement rings. CT represents “carat,” a unit provided to measure up a diamond’s weight. TW is brief for “total weight” and also is supplied to measure the complete weight of every keolistravelservices.com in a item of jewelry.

The carat load of one diamond and also the total carat weight of a diamond ring are really different number — a fact that can cause some confusion for first-time buyers. Below, we’ve explained how CTTW works, and how it different from other dimensions of a diamond’s weight.

CTTW vs. Carat: those the Difference?

As we extended in our guide to diamond carat weight, the carat weight of a diamond refers to the amount the diamond weighs, no its size. A diamond of a single metric carat weighs precisely 200 milligrams and also can variety in diameter native 5.60mm come 6.60mm depending on its reduced grade. 

Carat weight is abbreviation at “ct.” once you’re viewing loose keolistravelservices.com online, you’ll generally see their carat weight detailed alongside determinants such as cut, color and clarity. 

0.47cttw double Halo

CTTW, on the various other hand, refers to the total weight of every one of the keolistravelservices.com in a particular piece the jewelry. Unequal ct., i beg your pardon is supplied to display the load of a loosened diamond or facility stone, CTTW is only offered to display screen the total carat weight of all keolistravelservices.com. 

If did you do it read any of our various other guides, you could have likewise seen the acronym “CTW” provided to express to total carat weight. Both CTTW and CTW are used global and have actually the specific same meaning.

Many engagement rings only contain one center diamond. Because that example, this knife leaf solitaire setting from James Allen is designed come only organize a center stone. As a result, the ring’s total carat load (CTTW) will be the exact same as the carat weight of the facility stone.

Other rings, such as this lotus basket pavé engagement ring native James Allen, have a tape that’s inside wall with little keolistravelservices.com. This certain ring attributes 36 small round keolistravelservices.com, adding up come a full carat weight of 0.25 carat there is no a facility stone. 

The complete carat weight, or CTTW, of this ring is calculate by including together the carat load of the pavé set keolistravelservices.com and the load of the center stone. For example, by selecting this 1 carat ring H VS2 diamond from James Allen, the complete weight of the setup and center rock is 1.25 carats. 

Some engagement ring settings can have a significant total carat weight even prior to the center rock is added. Because that example, this grande halo split shank setting from James Allen has a 0.70 CTTW without any kind of center rock due to its 64 pavé and halo collection keolistravelservices.com. 

Total Carat weight (CTTW) and Diamond Prices

The price of a diamond increases greatly with its carat weight. For example, a sells because that $1,243. A 1.00 carat diamond through the exact same specifications costs $5,453, despite only being double the carat weight. 

The reason for this is simple. Large keolistravelservices.com are significantly rarer than smaller sized keolistravelservices.com and as a result, they have the right to command higher prices ~ above the market. Due to the fact that of this, a huge diamond is constantly going come be precious significantly more than a smaller diamond the the same quality.

1.15cttw Princess cut Pave Engagement Ring

This isn’t the instance with a ring’s full carat weight. Because this figure is make by including up the carat load of every one of the ring’s tiny keolistravelservices.com, there isn’t an exponential relationship in between the ring’s complete carat weight and also its value.

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

Meanwhile, through this 0.50 carat H color, VS2 diamond is obtainable for $2,763. It also has a full carat weight of 1.00 carat. 

This means that if she on a limited budget, a pavé or halo setting with a reasonably high full carat weight however a small center rock could be a an excellent idea. While girlfriend won’t gain the full wow element of a large center stone, a ring the this form can look beautiful and elegant, every at a lower cost.

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Other components to Look because that in a Diamond

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

Other factors, such together a diamond’s cut, color and also clarity, also play a duty in the appearance and value. Known as the 4 Cs, these factors all interact with each various other to influence the method a diamond looks and the amount you’ll pay for it. 

We’ve covered these in an ext detail, and what you need to look for, in our guide to purchase a diamond. 


CTTW, or total carat weight, constantly refers come the complete weight of all keolistravelservices.com in a ring, bracelet, earrings or various other pieces the jewelry. When you’re viewing a setting on its own, it’s the weight of the halo or pavé keolistravelservices.com. For a finish ring, the the load of all little keolistravelservices.com and also the center stone. 

Carat weight, i m sorry is abbreviated together ct, cw or CW, just refers come the load of the center rock on that own.

While a ring v a large total carat weight can look impressive, it’s essential to remember that the load of the center rock is generally the biggest factor in determining an engagement ring’s value. 

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