6.4 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 6.4 carat round lab grown diamonds usually range from $1,418 to $63,790, with an average price of $5,496.In the last month, prices for these diamonds are down 3.4%.Compare 71 verified listings across 6 retailers tracked by CaratRadar.
6.4 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 71 verified 6.4-carat round lab grown diamonds listed across 6 online retailers. Prices in this segment range from $1,418 to $63,790, with an average asking price of $5,496 and a median of $2,094.
The price spread of $62,372 (97.8% from highest to lowest) highlights why comparing identical certified diamonds across multiple retailers matters. Two identical certified diamonds can differ by hundreds or even thousands of dollars depending on the retailer.
These figures are based on our latest daily market data, matched by certification lab and certificate number across retailers, so you are comparing the exact same diamond.
71 diamonds tracked in this segment
Price range: $1,418 to $63,790
Average price: $5,496
Median price: $2,094
Available across 6 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
71
$1,418
$5,496
$2,094
$63,790
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
IGISave 72.1%6.35ct | Round | E | VS1 | Ideal
From $2,549
Compare at $9,130
IGISave 61.6%6.35ct | Round | E | VVS2 | Excellent
From $1,916
Compare at $4,987
IGISave 69.7%6.35ct | Round | F | VS2 | Ideal
From $1,464
Compare at $4,825
GIASave 71.3%6.35ct | Round | D | VVS1 | Excellent
From $15,786
Compare at $55,028
IGISave 88.3%6.35ct | Round | G | VS1 | Ideal
From $1,837
Compare at $15,650
IGISave 79.8%6.35ct | Round | E | VS1 | Ideal
From $2,123
Compare at $10,490
IGISave 49.6%6.35ct | Round | E | VS1 | Ideal
From $10,486
Compare at $20,823
IGISave 49.6%6.36ct | Round | E | VS1 | Ideal
From $10,501
Compare at $20,856
IGISave 80.6%6.36ct | Round | G | VS1 | Ideal
From $2,044
Compare at $10,560
IGISave 59.5%6.36ct | Round | D | VVS1 | Ideal
From $11,216
Compare at $27,700
IGISave 90.9%6.36ct | Round | E | VS2 | Excellent
From $1,586
Compare at $17,380
IGISave 76.3%6.36ct | Round | D | IF | Ideal
From $31,735
Compare at $133,720
IGISave 88%6.36ct | Round | E | VVS2 | Ideal
From $2,271
Compare at $18,970
IGISave 54.8%6.36ct | Round | E | VVS2 | Excellent
From $2,169
Compare at $4,799
IGISave 88%6.36ct | Round | H | VVS2 | Ideal
From $1,418
Compare at $11,830
IGISave 61.6%6.36ct | Round | E | VVS2 | Ideal
From $1,918
Compare at $4,993
GIASave 25.7%6.36ct | Round | D | FL | Ideal
From $63,790
Compare at $85,901
IGISave 80.7%6.36ct | Round | E | VVS2 | Excellent
From $2,745
Compare at $14,250
IGISave 66.8%6.37ct | Round | E | VS1 | Ideal
From $1,817
Compare at $5,475
IGISave 49.5%6.37ct | Round | F | VS1 | Ideal
From $9,588
Compare at $18,974
IGISave 79.8%6.37ct | Round | G | VS1 | Excellent
From $1,605
Compare at $7,940
IGISave 85.8%6.37ct | Round | E | VS2 | Excellent
From $2,094
Compare at $14,720
IGISave 88.9%6.38ct | Round | E | VVS2 | Ideal
From $2,101
Compare at $19,010
IGISave 54.8%6.38ct | Round | E | VVS2 | Excellent
From $2,176
Compare at $4,815
IGISave 72%6.38ct | Round | E | IF | Ideal
From $29,277
Compare at $104,480
GIASave 82.6%6.38ct | Round | E | VS2 | Excellent
From $4,493
Compare at $25,840
IGISave 86.9%6.38ct | Round | G | VS2 | Ideal
From $1,488
Compare at $11,320
GIASave 83%6.38ct | Round | E | VS1 | Excellent
From $5,917
Compare at $34,810
IGISave 10.7%6.39ct | Round | G | VS1 | Ideal
From $8,260
Compare at $9,246
IGISave 88.4%6.39ct | Round | E | VS1 | Excellent
From $1,922
Compare at $16,510
IGISave 61.6%6.39ct | Round | E | VVS2 | Excellent
From $1,926
Compare at $5,015
IGISave 62.4%6.39ct | Round | I | VVS2 | Ideal
From $3,540
Compare at $9,410
IGI6.39ct | Round | E | VS1 | Ideal
From $10,549
Compare at $11,672
IGISave 81%6.39ct | Round | G | VS1 | Excellent
From $1,610
Compare at $8,480
IGI6.4ct | Round | E | VS1 | Ideal
From $10,564
Compare at $11,690
IGISave 78%6.4ct | Round | G | VS2 | Ideal
From $1,492
Compare at $6,770
IGISave 78.7%6.4ct | Round | G | VS2 | Ideal
From $1,538
Compare at $7,210
IGISave 65.6%6.41ct | Round | E | VS1 | Excellent
From $1,829
Compare at $5,320
IGISave 81%6.41ct | Round | G | VS1 | Ideal
From $1,614
Compare at $8,510
IGISave 86.1%6.41ct | Round | E | VS1 | Ideal
From $2,295
Compare at $16,560
IGISave 89.3%6.41ct | Round | E | VS1 | Excellent
From $1,782
Compare at $16,650
IGISave 81.6%6.41ct | Round | E | VVS1 | Ideal
From $5,079
Compare at $27,620
IGISave 75.2%6.41ct | Round | E | VVS1 | Excellent
From $7,393
Compare at $29,780
IGISave 86.1%6.41ct | Round | E | VS1 | Ideal
From $2,295
Compare at $16,560
IGISave 12.3%6.41ct | Round | G | VS1 | Excellent
From $1,549
Compare at $1,767
GIASave 55.2%6.41ct | Round | D | VVS1 | Excellent
From $18,935
Compare at $42,259
IGISave 82.1%6.42ct | Round | G | VS1 | Ideal
From $1,616
Compare at $9,040
IGISave 41.3%6.42ct | Round | H | VS2 | Ideal
From $1,478
Compare at $2,517
IGI6.42ct | Round | F | VS1 | Ideal
From $9,659
Compare at $10,647
IGISave 87.9%6.42ct | Round | E | VVS2 | Ideal
From $2,306
Compare at $19,030
Entry pricing in this category starts around $1,418.
What to Know When Shopping for 6.4 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $62,372 or more.
- Focus on the 4Cs that matter most to you. Color and clarity grades drive price more than cut in many segments, but cut affects sparkle the most.
- The median price of $2,094 is a useful benchmark. If you see a deal significantly below this, verify the retailer's reputation and return policy.
- Consider eye-clean alternatives. Moving one clarity grade down (e.g., VS2 to SI1) can save 10-15% with no visible difference to the naked eye.
- Lab-grown diamonds offer excellent value. Ensure the stone comes with a GIA or IGI certificate confirming it is laboratory-grown.
- Check shipping, insurance, and return policies. The lowest sticker price is not always the best deal once you factor in total cost of purchase.
- Round brilliants command a premium due to higher rough waste during cutting. If budget matters, consider oval or cushion shapes for similar visual size.
Frequently Asked Questions
We currently track 71 comparable stones in this segment. Prices start around $1,418 and go up to $63,790.
Based on the latest market data, the average asking price is about $5,496 with a median around $2,094.
The observed spread is roughly $62,372 across tracked listings, which is about 97.8% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on our data, the median price is $2,094, which represents the midpoint of the market. Anything below this figure from a reputable retailer is a solid deal.
We currently track this stone category across 6 online retailers, giving you a broad view of the competitive landscape.
For most buyers, color differences below G are hard to detect once set in a ring. Clarity grades of VS2 and above are typically eye-clean. Prioritize cut quality for maximum brilliance, then balance color and clarity based on your budget.
Retailer pricing strategies, overhead costs, and margin targets all contribute. The exact certified diamond can differ by $62,372 across sellers, which is why direct certified-diamond comparison is essential.
We match diamonds across retailers by their certification lab and certificate number. This means the prices you see are for the exact same physical diamond, not just stones with similar specs. It is a true apples-to-apples comparison.
Diamond prices fluctuate based on supply and demand. Our data refreshes regularly so you can track trends over time. Use the price range on this page as a benchmark and compare it to historical averages when available.
Diamond Terminology
- Carat
- A unit of weight for diamonds equal to 200 milligrams. Larger carat weights are exponentially rarer, which is why prices increase non-linearly with size.
- Cut
- Refers to how well a diamond's facets interact with light. Cut quality ranges from Ideal to Poor and is the single biggest factor affecting a diamond's brilliance.
- Color
- Grades a diamond's lack of color on a scale from D (colorless) to Z (light yellow). Grades D-F are considered colorless; G-J are near-colorless and offer good value.
- Clarity
- Measures the presence of internal inclusions or surface blemishes. Grades range from Flawless (FL) to Included (I3). Most inclusions in VS2 and above are invisible to the naked eye.
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