5 Carat Diamonds

Shop 5 Carat Diamonds by Shape

Due to the weight of a 5-carat diamond, the shape has a big impact on how the weight is spread, how it is perceived, and the impact of color and clarity. 

Each shape spreads the same 5 carat weight differently, so here’s a closer look:

Round & Oval 5 Carat Diamonds

Round and Oval 5 carat diamonds are the most popular choices, with their rounded shapes giving a classic look. 

• Round 5 ct diamonds maximize brilliance and fire, creating a timeless and symmetrical look. They are the classic shape people picture when they imagine a diamond.

• Oval 5 ct diamonds provide elegance and a sense of finger elongation.  

Emerald, Cushion & Marquise 5 Carat Diamonds

Emerald, Cushion, and Marquise diamonds are renowned for their character and unique way of spreading weight. 

• Emerald 5 carat diamonds are statement-making stones, with step-cut facets and the famous ‘hall-of-mirrors’ effect. Their elongate rectangular shape creates a large face-up appearance. 

• Cushion 5-carat diamonds are a luxurious, vintage choice with rounded corners. They carry much of their weight in the pavilion, which can make them appear smaller from above than others. 

• Marquise 5-carat diamonds produce a dramatic look with a very large face-up appearance. 

How Big Is a 5 Carat Diamond?

5-carat diamonds weigh around 1 gram and are much larger than the average diamond engagement ring (of around 1 to 1.5 carats). 

A 5-carat round diamond is usually around 11mm in diameter. Learn more in our guide to 5 carat diamond rings.

5 Carat Diamond Prices

5-carat diamonds are on the high end of the market because of their size and desirability. But as with all diamonds, the price depends on all 4Cs: cut, clarity, color, and carat. 

On average, a natural 5 carat diamond will cost between $30,000 and over $300,000. A lab-grown 5 carat diamond will cost between $9,000 and $35,000. Learn more in our 4Cs and diamond cut guide.

What Drives the Price of a 5 Carat Diamond

The cost of a 5-carat diamond depends more on rarity than size alone. As carat weight increases, the possibility of finding enough large rough gem-quality stones becomes exceptionally rare. 

In fact, less than 1% of natural mined diamonds reach 5 carats. Combine this with rising demand for larger stones from modern consumers, and you can see why prices keep increasing. 

Why Cut Matters Most at 5 Carats

Larger stones amplify poor proportions. To avoid light leakage and weak sparkle, you need an excellent cut with strong symmetry and precise proportions. 

The 4 Cs at 5 Carats

However, because a large stone magnifies flaws and brilliance, it requires higher color, cut, and clarity grades, which drive prices up compared with lower-carat stones.

• Color: With size comes a longer light path and larger facets, so color is easier to spot with the naked eye. Therefore, 5 ct diamonds typically require at least a G color grade, with D-F more advised. 

• Clarity: Clarity is all about inclusions, which are easier to see in larger stones, so reputable sellers typically offer higher-clarity stones. 

Natural vs. Lab-Grown 5 Carat Diamonds

Natural diamonds are formed under the earth's surface over hundreds of thousands of years, making them wonders of nature. That rarity increases when you find one with great clarity and color.

Lab-grown diamonds, on the other hand, are produced through modern CVD or HPHT technology. While this brings wonderful results, it doesn’t hold the same charm or emotional value for many collectors. 

Why a Natural 5 Carat Diamond Holds Its Value

Loose natural diamonds are likely to hold value better than lab-grown diamonds due to their geological rarity and finite quantities in circulation. 

They have a deep secondary market and active auction scene, which helps them retain their emotional worth in a way that lab-grown diamonds simply can’t.

5 Carat Diamond Rings & Settings

5-carat diamond rings require a more secure and therefore bolder setting style than you’ll see with smaller stones. 

We recommend a band width of around 2.5 to 3mm, for security without being too bulky. 

We also recommend choosing the metal carefully, as it can change how the diamond's color is perceived. White gold or platinum can help the stone appear whiter, while yellow or rose gold adds warmth for diamonds with a lower color grade or a vintage feel. 

Here’s a quick rundown of popular engagement ring settings for 5-carat diamonds:

Best Settings to Showcase a 5 Carat Diamond

Here’s a look at the best settings for a 5-carat diamond: 

• Solitaire: Ideal for showcasing the stone's size in a clean style.

• Halo: Perfect for adding extra sparkle and appeal. Especially suitable for round and cushion cuts. 

• Pavé and Side Stone: Ideal for enhancing a 5-carat diamond ring with luxury side-stone details. 

• Three Stone: Best for baguette or pear side stones, symbolizing the past, present, and future of your relationship.

• Hidden Halo: Perfect for adding extra sparkle around a 5 carat diamond ring without distracting from the center stone.

Why Buy a 5 Carat Diamond from Brian Gavin Diamonds

GIA and AGS Certified 

Brian Gavin’s curated collection of 5 carat diamond rings is fully GIA- and AGS-certified. From cut and clarity to color and carat, this independent grading is crucial for a stone of this size, so you know exactly what you’re investing in.

Signature Cut and Light Performance

Brian Gavin’s signature cutting and exacting proportions mean each of our 5 carat rings and stones sparkle with exceptional light performance. With our exemplary craftsmanship and ASET and light-performance imaging tests, your stone will make hearts flutter time and time again. 

FAQs on 5 Carat Diamonds

How big is a 5 carat diamond?

A 5 carat round brilliant diamond is around 11 mm in diameter. 

How much does a 5 carat diamond cost?

A natural 5 carat diamond costs around $30,000 to $300,000. A lab-grown 5 carat diamond will cost between $9,000 and $35,000. 

Is a 5 carat diamond too big for an engagement ring?

No, a 5ct diamond engagement ring is slightly unusual but certainly not too big if your partner dreams of a big, bold stone. If this feels too big, you may want to compromise with a 3 carat diamond.

What is the best shape for a 5 carat diamond?

The best shape comes down to personal preference. A round brilliant offers maximum sparkle, while marquise, pear, oval, and emerald offer an elongated shape. For elegance and clean lines, go for an emerald or asscher. 

Are 5 carat lab-grown diamonds worth it compared to natural?

This depends on your priorities. While they will look the same on a ring, a lab-grown stone will lose the sentimental and collector value that natural diamonds possess. 

Why does cut quality matter more on a 5 carat diamond?

According to Brian Gavin, a fifth‑generation master diamond cutter, cut quality matters most at 5 carats because a large stone magnifies both brilliance and flaws. Therefore, cut and clarity grades are important because they indicate the number of inclusions, dark areas, and light performance.