6.4 Carat Round Lab Grown Diamond Prices Comparison
As of April 2026, 6.4 carat round lab grown diamonds usually range from $1,275 to $57,316, with an average price of $6,642.In the last month, prices for these diamonds are down 1.7%.Compare 51 verified listings across 5 retailers tracked by CaratRadar.
6.4 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 51 verified 6.4-carat round lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,275 to $57,316, with an average asking price of $6,642 and a median of $4,349.
The price spread of $56,041 (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.
51 diamonds tracked in this segment
Price range: $1,275 to $57,316
Average price: $6,642
Median price: $4,349
Available across 5 retailers
Savings potential: up to 97.8%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
51
$1,275
$6,642
$4,349
$57,316
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 52.7%GIA | 6.41ct | Round | D | VVS1 | Excellent
From $14,331
Compare at $30,303
Save 79.9%IGI | 6.41ct | Round | E | VS1 | Ideal
From $3,337
Compare at $16,560
Save 77.7%IGI | 6.41ct | Round | G | VS1 | Ideal
From $1,803
Compare at $8,070
Save 79.9%IGI | 6.41ct | Round | E | VS1 | Ideal
From $3,337
Compare at $16,560
Save 88.3%IGI | 6.41ct | Round | E | VS1 | Excellent
From $1,949
Compare at $16,640
Save 79.2%IGI | 6.41ct | Round | E | VVS1 | Ideal
From $4,813
Compare at $23,150
Save 84.3%IGI | 6.41ct | Round | E | VVS1 | Excellent
From $3,626
Compare at $23,100
Save 83.2%IGI | 6.41ct | Round | E | VS1 | Excellent
From $1,365
Compare at $8,110
Save 79.2%IGI | 6.42ct | Round | G | VS1 | Ideal
From $1,805
Compare at $8,670
Save 75.1%IGI | 6.42ct | Round | E | VVS2 | Ideal
From $2,005
Compare at $8,050
Save 64.2%IGI | 6.42ct | Round | F | VS1 | Excellent
From $1,817
Compare at $5,070
Save 77.5%IGI | 6.43ct | Round | E | VVS1 | Ideal
From $11,686
Compare at $51,830
Save 78.5%IGI | 6.43ct | Round | E | VVS2 | Ideal
From $4,096
Compare at $19,060
Save 82.7%IGI | 6.43ct | Round | G | VS1 | Ideal
From $1,808
Compare at $10,430
Save 80.5%IGI | 6.43ct | Round | G | VS1 | Ideal
From $1,808
Compare at $9,260
Save 81.6%IGI | 6.43ct | Round | G | VS1 | Ideal
From $1,808
Compare at $9,840
Save 85.2%IGI | 6.43ct | Round | F | VS2 | Excellent
From $2,008
Compare at $13,600
Save 88.2%IGI | 6.43ct | Round | E | VS2 | Ideal
From $1,755
Compare at $14,930
Save 78.4%IGI | 6.43ct | Round | E | VS1 | Ideal
From $2,356
Compare at $10,910
Save 86.6%IGI | 6.43ct | Round | E | VS2 | Ideal
From $2,008
Compare at $14,940
Save 38.8%IGI | 6.43ct | Round | E | VVS2 | Excellent
From $1,824
Compare at $2,980
Save 76.3%IGI | 6.44ct | Round | F | VVS2 | Ideal
From $7,336
Compare at $30,930
Save 77%IGI | 6.44ct | Round | G | VS1 | Ideal
From $2,820
Compare at $12,270
Save 75.7%IGI | 6.44ct | Round | G | VS1 | Ideal
From $1,828
Compare at $7,530
Save 87.1%IGI | 6.44ct | Round | E | VVS2 | Ideal
From $2,482
Compare at $19,190
Save 73.9%IGI | 6.44ct | Round | E | VVS2 | Ideal
From $1,505
Compare at $5,772
Save 88.8%IGI | 6.44ct | Round | E | VVS2 | Excellent
From $2,135
Compare at $19,090
Save 83.6%IGI | 6.45ct | Round | F | VVS1 | Ideal
From $3,336
Compare at $20,350
Save 86.6%IGI | 6.45ct | Round | F | VS1 | Excellent
From $2,050
Compare at $15,300
Save 68.8%GIA | 6.46ct | Round | G | VS2 | Excellent
From $3,613
Compare at $11,590
Save 83.6%IGI | 6.46ct | Round | G | VS1 | Ideal
From $1,817
Compare at $11,050
Save 78.4%IGI | 6.46ct | Round | H | VS1 | Ideal
From $2,424
Compare at $11,220
Save 87.1%IGI | 6.46ct | Round | E | VVS2 | Ideal
From $2,489
Compare at $19,250
Save 86.9%IGI | 6.46ct | Round | F | VVS2 | Ideal
From $2,264
Compare at $17,300
Save 85.2%IGI | 6.46ct | Round | F | VS2 | Excellent
From $2,017
Compare at $13,670
Save 77.8%IGI | 6.46ct | Round | F | VVS2 | Ideal
From $1,927
Compare at $8,690
Save 62.7%IGI | 6.46ct | Round | F | VS1 | Excellent
From $1,828
Compare at $4,905
Save 78.7%IGI | 6.47ct | Round | G | VS1 | Ideal
From $2,756
Compare at $12,920
Save 70.1%IGI | 6.47ct | Round | E | IF | Ideal
From $18,172
Compare at $60,860
Save 77.5%IGI | 6.47ct | Round | E | VVS1 | Ideal
From $11,757
Compare at $52,150
Save 56.2%IGI | 6.47ct | Round | D | VS1 | Ideal
From $3,058
Compare at $6,986
Save 77.8%IGI | 6.47ct | Round | F | VVS2 | Excellent
From $1,929
Compare at $8,700
Save 77.8%IGI | 6.47ct | Round | F | VVS2 | Excellent
From $1,929
Compare at $8,700
Save 62.8%IGI | 6.47ct | Round | F | VS1 | Excellent
From $1,831
Compare at $4,915
Save 87.1%IGI | 6.48ct | Round | E | VVS2 | Ideal
From $2,497
Compare at $19,310
Save 73.4%IGI | 6.48ct | Round | E | VVS2 | Ideal
From $4,340
Compare at $16,330
Save 87.3%IGI | 6.48ct | Round | E | VS1 | Excellent
From $2,130
Compare at $16,740
Save 82.2%GIA | 6.49ct | Round | D | VVS2 | Excellent
From $8,635
Compare at $48,600
Save 84.4%IGI | 6.49ct | Round | G | VS1 | Ideal
From $1,825
Compare at $11,690
Save 86%IGI | 6.49ct | Round | F | VS1 | Ideal
From $2,151
Compare at $15,380
Entry pricing in this category starts around $1,275.
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 $56,041 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 $4,349 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 51 comparable stones in this segment. Prices start around $1,275 and go up to $57,316.
Based on the latest market data, the average asking price is about $6,642 with a median around $4,349.
The observed spread is roughly $56,041 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 $4,349, 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 5 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 $56,041 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
6.3 Carat Round Lab Grown Diamond Prices
6.5 Carat Round Lab Grown Diamond Prices
6.2 Carat Round Lab Grown Diamond Prices
6.6 Carat Round Lab Grown Diamond Prices
6.1 Carat Round Lab Grown Diamond Prices
6.7 Carat Round Lab Grown Diamond Prices
6 Carat Round Lab Grown Diamond Prices
6.4 Carat Oval Lab Grown Diamond Prices
6.4 Carat Emerald Lab Grown Diamond Prices
6.4 Carat Cushion Lab Grown Diamond Prices
6.4 Carat Pear Lab Grown Diamond Prices
6.4 Carat Radiant Lab Grown Diamond Prices
Tracking Lab Grown inventory for 6.4 carat Round diamonds.