How Big Are 1.5 Carat Diamond Rings?

Sharif Khan
Sharif Khan
Last Updated    EST 
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If you are a savvy jewelry shopper, the decision to settle on 1.5 carats instead of 1.4 or 1.6 carats is likely influenced by a profound understanding of diamonds. However, some buyers opt for 1.5 carat diamonds purely based on cost considerations because they find a 2.0 carat diamond expensive. Therefore, they settle on 1.5 carats to secure the best bargain, thinking the cost would be much lower. However, the jewelry industry only sometimes works out that way. This post will highlight the pros and cons of 1.5 carat diamonds and examine whether it is the right choice for buyers to consider.

Watch vidoes of 1.5 Carat Diamonds in Super HD Here.

Why A 1.5 Carat Diamond

1.5 lies midway between 1 and 2. Customers who prefer the stone’s invincibility would purchase 1.0 carats when shopping for diamonds. On the other hand, those who love the glamour and sparkle that diamonds bring out are likely to settle for 2 carats. The price also plays a significant role here. A 1.5-carat diamond is expected to be considerably cheaper than a 2 carat diamond, obviously subject to all the remaining constant factors.

James Allen Diamonds

The illustration above shows that 1.5 carat diamonds enable you to enjoy the best of both worlds. You end up with a stone small enough to retain its chic appearance and big enough to be eye-catching. If you are fortunate, you may come across a 1.5 carat diamond priced half as much as a 2 carat diamond, even if the stones are similar in all other aspects. Many diamond shoppers, especially women, generally believe that 1.5 carat is the ideal diamond weight.

However, you probably already know that each customer has unique tastes and preferences when buying diamonds. Therefore, before shopping for a 1.5 carat diamond, you must have determined its suitability. Another thing to remember is that as a jewelry shopper, the cost consideration should always come last.

First, you need to settle on your preferred color, cut, and clarity, which we believe you have already taken care of. As such, your only remaining concern is choosing the ideal carat weight.

Forget the popularity that accompanies the 1.5 carat diamonds. As a diamond shopper, the first thing that you should establish is whether you are comfortable with the size. And as you know, size can be pretty relative—what works for you might not work for the lady next door.

1.5 carat diamond actual size

How Big Is A 1.5 Carat Diamond?

A 1.5-carat diamond has a diameter of 7.4 mm. This is 1.0 mm larger than the diameter of a 1-carat diamond and 0.6 mm smaller than that of a 2-carat diamond. Besides, 1.5-carat diamonds feature a face-up surface area of 43mm 2, roughly 18% smaller than 2 carat diamonds. Thus, everything considered, a 1.5-carat diamond is outstanding. It can stand out better depending on the wearer's hand and the ring on which it is set. The smaller the hand or ring, the more prominent the diamond.

But as you may expect, the size of a 1.5 carat diamond depends on a few other factors. Generally, the size comes down to the balance of the Four Cs. It is not unusual to come across a 1-carat diamond that looks larger than a 1.5 carat stone, nor is it surprising to find a 2-carat diamond looking significantly smaller than a 1.5 carat diamond.

diamond cut is the most critical element of the Four Cs that influences the size of a 1.5 carat diamond. In this regard, Asscher and round cuts tend to look smaller. On the other hand, marquise, oval, emerald, and pear cuts give a much better illusion of size.

The following table illustrates the surface areas of 1.5-carat diamonds across popular cuts.




6.4 x 6.4


7.5 x 7.5


7.4 x 7.4


6.3 x 6.3


7.2 x 5.8


10.4 x 6.2


7.6 x 5.7


9.3 x 6.2


11.9 x 6


6.7 x 6.7

Besides the diamond cut, color is another critical consideration when shopping for a 1.5 carat diamond. Again, diamonds handle color differently depending on their cut and clarity score; larger diamonds tend to reveal more tint. That means if other factors are kept constant, a 1.5-carat diamond will likely give more sparkle than a 1-carat diamond. The fire and brilliance of a 1.5-carat stone will also depend on the ring’s color on which it is set. For instance, yellow and white rings tend to enhance the color of a diamond.

Pear, Marquise, and Oval shapes feature elongated corners. Therefore, they trap more light and color. If you were to select from among these three based on the light-handling properties, your best bet would be to go for anything above H in the diamond color scale. On the other hand, Round, Cushion, and Princess Cuts have shorter ends. As such, they reflect minimal light and color. When choosing a 1.5-carat diamond from any of these categories, experts recommend going for the color H and a clarity of VS2.

The Asscher and Emerald cuts are the most sensitive shapes regarding color-handling properties. As these shapes feature large windows that stretch into the depth of the diamond, they will reveal even the slightest color hues and imperfections. While shopping for a 1.5-carat diamond from between these cuts, you can consider color H and a clarity of VS1.

Another significant element that will impact the size of your 1.5-carat diamond is its clarity. Clarity depends on what the shopper finds eye-clean. Flaws and inclusions affect a diamond’s ability to absorb and reflect light. Therefore, a flawed 1.5-carat diamond will look smaller than it should. Consequently, you must always go for transparent, eye-clean diamonds.

Lastly, if you wish to enhance the size of your 1.5 carat diamond, find a decent setting for it. The halo setting is one of the top recommendations here. It features small diamonds surrounding the center stone. Anyone looking from afar would think that it is one large stone. Consider using pave rings with slightly tapered shanks.

Some common mounting styles to avoid include the bezel and the 3-stone design. Such settings are designed to bring out the shape of the stone, not necessarily its brilliance.

How Much Does a 1.5-Carat Diamond Cost?

Please refer to our diamond prices charts for reference.

It can range anywhere from $5,000 to $35,000. This is quite a long shot, as the price of a 1.5 carat diamond depends on a couple of factors. Diamonds in fancy colors, such as red, will naturally cost more. So, if you are looking for colored diamonds, avoid fancy colors when strapped for cash. It is a tough balancing act because fancy colors have impressive light-handling properties and create a better illusion of size. Therefore, while it is the most expensive of all colored diamonds, choosing red might save you the agony of gaining more carat weight.

As for the color, consider going for transparent diamonds. Colorless diamonds are nearly as expensive as red diamonds because of their minimal flaws. But since they reflect maximum color, they will help accentuate the size of your 1.5-carat diamond. For the best bargains, always consider shopping online from reputable dealers.

The question regarding the suitability of a 1.5 carat diamond differs from one you can settle in at once. You must carefully review how your decision affects the other elements—cut, color, and clarity. Likec most people, you will desire a diamond that stands out from your ring. Therefore, you must insist on fancy colors and cuts with elongated angles.