6.5 Carat Radiant Lab Grown Diamond Prices Comparison
As of April 2026, 6.5 carat radiant lab grown diamonds usually range from $1,080 to $24,756, with an average price of $5,591.In the last month, prices for these diamonds are down 0.7%.Compare 104 verified listings across 7 retailers tracked by CaratRadar.
6.5 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 104 verified 6.5-carat radiant lab grown diamonds listed across 7 online retailers. Prices in this segment range from $1,080 to $24,756, with an average asking price of $5,591 and a median of $4,137.
The price spread of $23,676 (95.6% 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.
104 diamonds tracked in this segment
Price range: $1,080 to $24,756
Average price: $5,591
Median price: $4,137
Available across 7 retailers
Savings potential: up to 95.6%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
104
$1,080
$5,591
$4,137
$24,756
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 34.8%GIA | 6.5ct | Radiant | D | FL | Ideal
From $56,310
Compare at $86,317
Save 82.6%IGI | 6.5ct | Radiant | F | VS1 | Ideal
From $2,332
Compare at $13,370
Save 48.6%IGI | 6.5ct | Radiant | F | VVS1 | Very Good
From $3,427
Compare at $6,664
Save 61.4%IGI | 6.5ct | Radiant | G | VS2 | Ideal
From $1,493
Compare at $3,872
Save 83%IGI | 6.5ct | Radiant | F | VVS2 | Ideal
From $2,456
Compare at $14,490
Save 14.1%IGI | 6.5ct | Radiant | F | VS1 | Excellent
From $1,943
Compare at $2,263
Save 85.4%IGI | 6.5ct | Radiant | G | VVS2 | Very Good
From $1,888
Compare at $12,920
Save 47.2%IGI | 6.5ct | Radiant | F | VS2 | Ideal
From $3,510
Compare at $6,650
Save 75.7%IGI | 6.51ct | Radiant | G | SI1 | Ideal
From $2,213
Compare at $9,110
Save 75.8%IGI | 6.51ct | Radiant | G | VS1 | Ideal
From $1,848
Compare at $7,650
Save 72.8%IGI | 6.51ct | Radiant | G | VS2 | Ideal
From $1,677
Compare at $6,170
Save 82%IGI | 6.51ct | Radiant | G | VVS2 | Ideal
From $2,336
Compare at $12,960
Save 77.1%IGI | 6.51ct | Radiant | F | VS1 | Ideal
From $2,093
Compare at $9,160
Save 69.1%IGI | 6.51ct | Radiant | I | VS1 | Ideal
From $2,420
Compare at $7,830
IGI | 6.51ct | Radiant | F | VVS2 | Ideal
From $14,510
Save 75.9%IGI | 6.51ct | Radiant | G | VS1 | Ideal
From $1,667
Compare at $6,920
Save 86.2%IGI | 6.51ct | Radiant | F | VVS2 | Excellent
From $2,020
Compare at $14,590
Save 80.5%IGI | 6.51ct | Radiant | F | VVS2 | Very Good
From $2,857
Compare at $14,630
Save 86.2%IGI | 6.51ct | Radiant | F | VVS2 | Excellent
From $2,020
Compare at $14,590
Save 86.2%IGI | 6.51ct | Radiant | F | VVS2 | Ideal
From $2,020
Compare at $14,610
Save 72%IGI | 6.51ct | Radiant | E | VVS2 | Excellent
From $4,557
Compare at $16,270
Save 68.8%GIA | 6.52ct | Radiant | H | VS1 | Ideal
From $3,462
Compare at $11,090
Save 57.6%IGI | 6.52ct | Radiant | H | VS2 | Excellent
From $3,521
Compare at $8,310
Save 87.3%IGI | 6.52ct | Radiant | F | VVS2 | Very Good
From $2,278
Compare at $18,006
Save 85.5%IGI | 6.52ct | Radiant | F | VVS2 | Excellent
From $2,123
Compare at $14,620
Save 84.3%IGI | 6.52ct | Radiant | E | VS2 | Very Good
From $2,041
Compare at $12,970
Save 65.1%IGI | 6.52ct | Radiant | F | VS1 | Ideal
From $1,799
Compare at $5,150
Save 84.6%IGI | 6.52ct | Radiant | E | VVS2 | Excellent
From $2,504
Compare at $16,260
Save 83.2%IGI | 6.52ct | Radiant | F | VS1 | Ideal
From $2,253
Compare at $13,410
Save 88.7%IGI | 6.52ct | Radiant | E | VVS2 | Excellent
From $1,845
Compare at $16,270
IGI | 6.52ct | Radiant | D | VS1 | Very Good
From $3,913
Compare at $4,213
IGI | 6.52ct | Radiant | FANCY | VVS2 | Very Good
From $4,225
Compare at $6,026
IGI | 6.52ct | Radiant | FANCY | VVS2 | Very Good
From $5,750
Compare at $14,810
Save 72.5%GIA | 6.53ct | Radiant | G | VS2 | Ideal
From $3,189
Compare at $11,600
Save 74.5%IGI | 6.53ct | Radiant | E | VS1 | Excellent
From $2,951
Compare at $11,580
Save 44.3%IGI | 6.53ct | Radiant | F | VVS2 | Very Good
From $2,045
Compare at $3,672
Save 86.3%IGI | 6.53ct | Radiant | E | VS1 | Excellent
From $2,229
Compare at $16,320
Save 83.7%IGI | 6.53ct | Radiant | F | VS2 | Excellent
From $1,887
Compare at $11,590
Save 12.6%IGI | 6.53ct | Radiant | G | VVS2 | Good
From $1,896
Compare at $2,170
Save 80.5%IGI | 6.53ct | Radiant | F | VVS2 | Excellent
From $2,865
Compare at $14,700
Save 71.4%IGI | 6.53ct | Radiant | E | VS1 | Very Good
From $3,168
Compare at $11,060
Save 85.1%IGI | 6.53ct | Radiant | F | VVS2 | Ideal
From $2,174
Compare at $14,550
Save 86.3%IGI | 6.53ct | Radiant | E | VS1 | Very Good
From $2,237
Compare at $16,330
Save 84.4%IGI | 6.53ct | Radiant | E | VS1 | Ideal
From $2,541
Compare at $16,330
Save 75.6%GIA | 6.54ct | Radiant | E | VS1 | Excellent
From $10,294
Compare at $42,250
Save 64%IGI | 6.54ct | Radiant | G | VS1 | Ideal
From $3,087
Compare at $8,580
Save 40.6%IGI | 6.54ct | Radiant | H | VS2 | Very Good
From $1,255
Compare at $2,113
Save 81.9%IGI | 6.54ct | Radiant | H | VVS2 | Ideal
From $1,970
Compare at $10,900
Save 86.2%IGI | 6.54ct | Radiant | E | VS1 | Excellent
From $2,255
Compare at $16,360
Save 84.8%IGI | 6.54ct | Radiant | F | VS1 | Very Good
From $2,048
Compare at $13,450
Entry pricing in this category starts around $1,080.
What to Know When Shopping for 6.5 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $23,676 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 $4,137 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.
- Radiant cuts combine the elegance of emerald shapes with the brilliance of round cuts, offering good value per carat.
Frequently Asked Questions
We currently track 104 comparable stones in this segment. Prices start around $1,080 and go up to $24,756.
Based on the latest market data, the average asking price is about $5,591 with a median around $4,137.
The observed spread is roughly $23,676 across tracked listings, which is about 95.6% 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 $4,137, 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 7 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 $23,676 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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