6.3 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 6.3 carat radiant lab grown diamonds usually range from $1,221 to $61,840, with an average price of $4,438.In the last month, prices for these diamonds are down 3.3%.Compare 45 verified listings across 5 retailers tracked by CaratRadar.
6.3 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 45 verified 6.3-carat radiant lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,221 to $61,840, with an average asking price of $4,438 and a median of $1,859.
The price spread of $60,619 (98.0% 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.
45 diamonds tracked in this segment
Price range: $1,221 to $61,840
Average price: $4,438
Median price: $1,859
Available across 5 retailers
Savings potential: up to 98.0%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
45
$1,221
$4,438
$1,859
$61,840
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 40.8%6.25ct | Radiant | E | VVS2 | Excellent
From $2,267
Compare at $3,832
IGISave 71.5%6.25ct | Radiant | E | VS1 | Very Good
From $2,567
Compare at $8,990
IGISave 60.7%6.25ct | Radiant | F | VS1 | Very Good
From $4,008
Compare at $10,205
IGISave 88.5%6.26ct | Radiant | E | VS1 | Ideal
From $1,808
Compare at $15,660
IGISave 72.7%6.26ct | Radiant | F | VS1 | Ideal
From $1,350
Compare at $4,945
IGISave 81.4%6.26ct | Radiant | E | VS1 | Very Good
From $2,364
Compare at $12,710
IGISave 78.6%6.26ct | Radiant | E | SI1 | Ideal
From $2,182
Compare at $10,200
IGISave 80%6.26ct | Radiant | D | VS1 | Excellent
From $3,508
Compare at $17,500
IGISave 60%6.27ct | Radiant | E | VVS2 | Ideal
From $4,084
Compare at $10,210
GIASave 80.8%6.27ct | Radiant | E | VVS2 | Excellent
From $3,235
Compare at $16,820
IGISave 86.7%6.27ct | Radiant | G | VS2 | Ideal
From $1,616
Compare at $12,160
IGISave 82.8%6.27ct | Radiant | G | VVS2 | Ideal
From $2,143
Compare at $12,470
IGISave 20.2%6.27ct | Radiant | D | VS1 | Very Good
From $3,297
Compare at $4,132
IGISave 79.8%6.27ct | Radiant | D | VS1 | Excellent
From $3,245
Compare at $16,090
IGISave 61.4%6.27ct | Radiant | E | SI1 | Ideal
From $1,221
Compare at $3,161
IGISave 86.7%6.28ct | Radiant | G | VS2 | Ideal
From $1,618
Compare at $12,180
IGISave 82.2%6.28ct | Radiant | F | SI2 | Excellent
From $1,437
Compare at $8,070
IGISave 88.5%6.28ct | Radiant | E | VS1 | Very Good
From $1,814
Compare at $15,720
IGISave 87.9%6.28ct | Radiant | F | VS2 | Ideal
From $1,337
Compare at $11,070
IGISave 78.2%6.28ct | Radiant | F | VS1 | Excellent
From $2,094
Compare at $9,620
GIASave 66.1%6.28ct | Radiant | D | IF | Excellent
From $61,840
Compare at $182,670
IGISave 87.9%6.28ct | Radiant | G | VS1 | Very Good
From $1,563
Compare at $12,931
IGISave 19.8%6.28ct | Radiant | F | VS2 | Very Good
From $1,358
Compare at $1,693
IGISave 84.9%6.29ct | Radiant | F | VVS2 | Ideal
From $1,484
Compare at $9,850
IGISave 89.9%6.29ct | Radiant | E | VS1 | Ideal
From $1,870
Compare at $18,520
IGISave 72.7%6.29ct | Radiant | F | VS1 | Ideal
From $1,355
Compare at $4,965
IGISave 55.1%6.29ct | Radiant | E | VVS2 | Ideal
From $4,854
Compare at $10,800
IGISave 66%6.29ct | Radiant | F | VS1 | Ideal
From $3,048
Compare at $8,970
IGISave 88.3%6.29ct | Radiant | F | VS2 | Ideal
From $1,301
Compare at $11,090
IGISave 99.3%6.3ct | Radiant | H | VS1 | Excellent
From $1,432
Compare at $211,050
IGISave 29%6.3ct | Radiant | H | VS1 | Ideal
From $1,325
Compare at $1,866
IGISave 88.8%6.3ct | Radiant | E | VS1 | Excellent
From $1,752
Compare at $15,660
6.3ct | Radiant | E | VVS2 | Excellent
From $2,043
Compare at $5,039
IGISave 79%6.3ct | Radiant | G | VS1 | Ideal
From $1,448
Compare at $6,880
IGISave 71.8%6.3ct | Radiant | E | VVS2 | Ideal
From $4,420
Compare at $15,670
IGISave 87.2%6.3ct | Radiant | F | VS1 | Excellent
From $1,666
Compare at $13,040
IGISave 85.9%6.3ct | Radiant | G | VS1 | Ideal
From $1,886
Compare at $13,410
IGISave 72.5%6.31ct | Radiant | F | VS1 | Ideal
From $1,368
Compare at $4,980
IGISave 89.2%6.31ct | Radiant | F | VVS2 | Excellent
From $1,729
Compare at $16,040
IGISave 26.8%6.32ct | Radiant | FANCY | VS1 | Very Good
From $4,301
Compare at $5,873
IGISave 80.7%6.33ct | Radiant | F | VS2 | Ideal
From $1,859
Compare at $9,650
IGISave 89.2%6.33ct | Radiant | F | VVS2 | Excellent
From $1,734
Compare at $16,070
GIASave 76.9%6.34ct | Radiant | D | IF | Excellent
From $42,620
Compare at $184,420
GIASave 80.1%6.34ct | Radiant | F | VS2 | Ideal
From $2,483
Compare at $12,460
IGISave 87.4%6.34ct | Radiant | F | VVS2 | Excellent
From $1,783
Compare at $14,130
Entry pricing in this category starts around $1,221.
What to Know When Shopping for 6.3 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $60,619 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 $1,859 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 45 comparable stones in this segment. Prices start around $1,221 and go up to $61,840.
Based on the latest market data, the average asking price is about $4,438 with a median around $1,859.
The observed spread is roughly $60,619 across tracked listings, which is about 98.0% 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 $1,859, 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 $60,619 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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