6.3 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 6.3 carat round lab grown diamonds usually range from $1,108 to $44,454, with an average price of $5,876.In the last month, prices for these diamonds are down 2.3%.Compare 80 verified listings across 5 retailers tracked by CaratRadar.
6.3 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 80 verified 6.3-carat round lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,108 to $44,454, with an average asking price of $5,876 and a median of $2,031.
The price spread of $43,346 (97.5% 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.
80 diamonds tracked in this segment
Price range: $1,108 to $44,454
Average price: $5,876
Median price: $2,031
Available across 5 retailers
Savings potential: up to 97.5%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
80
$1,108
$5,876
$2,031
$44,454
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 82.9%6.25ct | Round | D | VVS2 | Excellent
From $8,315
Compare at $48,490
IGISave 86.1%6.25ct | Round | G | VS2 | Ideal
From $1,819
Compare at $13,130
IGISave 80.8%6.25ct | Round | G | VS1 | Ideal
From $1,493
Compare at $7,790
IGI6.25ct | Round | E | VS1 | Ideal
From $10,328
Compare at $11,417
IGI6.25ct | Round | E | VS1 | Ideal
From $10,328
Compare at $11,417
IGISave 88.9%6.25ct | Round | E | VVS2 | Ideal
From $2,063
Compare at $18,620
IGISave 88.4%6.25ct | Round | E | VVS1 | Ideal
From $2,611
Compare at $22,570
IGISave 31.7%6.25ct | Round | F | VVS2 | Ideal
From $2,018
Compare at $2,953
IGI6.25ct | Round | F | VVS2 | Ideal
From $10,328
Compare at $11,417
IGISave 85.7%6.26ct | Round | G | SI1 | Excellent
From $1,430
Compare at $9,991
IGISave 84.2%6.26ct | Round | I | VS2 | Ideal
From $1,108
Compare at $7,010
IGISave 88%6.26ct | Round | F | VS2 | Ideal
From $1,892
Compare at $15,820
IGISave 82%6.26ct | Round | G | VS1 | Ideal
From $1,495
Compare at $8,310
IGISave 16.2%6.26ct | Round | G | VS1 | Excellent
From $1,543
Compare at $1,840
IGISave 86.2%6.26ct | Round | E | VVS2 | Ideal
From $2,581
Compare at $18,690
IGISave 74.7%6.26ct | Round | F | VS2 | Excellent
From $2,007
Compare at $7,940
IGISave 82.1%6.26ct | Round | F | VVS1 | Very Good
From $4,206
Compare at $23,550
IGISave 72.1%6.27ct | Round | J | VVS2 | Ideal
From $2,607
Compare at $9,360
IGISave 86.1%6.27ct | Round | D | VVS2 | Ideal
From $3,082
Compare at $22,150
IGISave 88.6%6.27ct | Round | E | VS1 | Ideal
From $1,846
Compare at $16,200
IGISave 72%6.27ct | Round | E | IF | Ideal
From $28,777
Compare at $102,690
IGISave 80.6%6.27ct | Round | G | VS1 | Ideal
From $2,018
Compare at $10,420
IGISave 89.6%6.28ct | Round | E | VVS2 | Ideal
From $1,938
Compare at $18,610
IGISave 59.9%6.28ct | Round | G | VS1 | Ideal
From $1,355
Compare at $3,381
IGISave 48.6%6.28ct | Round | FANCY | VS2 | Ideal
From $2,442
Compare at $4,754
IGISave 68.9%6.28ct | Round | F | VS2 | Excellent
From $1,484
Compare at $4,770
IGISave 81.5%6.29ct | Round | G | VS1 | Ideal
From $1,636
Compare at $8,850
IGISave 92.4%6.29ct | Round | F | VVS2 | Ideal
From $1,485
Compare at $19,530
GIASave 76.1%6.29ct | Round | D | VVS1 | Excellent
From $15,749
Compare at $65,920
GIASave 82.8%6.29ct | Round | D | VVS2 | Excellent
From $8,370
Compare at $48,800
IGISave 75.9%6.3ct | Round | G | VS1 | Ideal
From $2,027
Compare at $8,420
GIASave 84.4%6.3ct | Round | D | VVS1 | Excellent
From $13,100
Compare at $84,058
GIASave 72.3%6.3ct | Round | G | SI1 | Excellent
From $3,069
Compare at $11,080
IGISave 84%6.3ct | Round | G | VS1 | Excellent
From $1,334
Compare at $8,330
IGISave 62.1%6.3ct | Round | F | VVS2 | Excellent
From $1,666
Compare at $4,389
IGISave 90.1%6.3ct | Round | E | VVS2 | Ideal
From $1,856
Compare at $18,750
IGISave 78.6%6.3ct | Round | E | VS1 | Excellent
From $2,089
Compare at $9,770
IGISave 82.9%6.3ct | Round | G | IF | Ideal
From $13,556
Compare at $79,330
GIASave 80.7%6.3ct | Round | D | IF | Ideal
From $33,190
Compare at $172,350
GIASave 21.2%6.3ct | Round | D | FL | Excellent
From $44,454
Compare at $56,382
IGISave 78.5%6.3ct | Round | E | VVS2 | Ideal
From $2,721
Compare at $12,660
IGISave 88.7%6.3ct | Round | F | VS2 | Ideal
From $1,517
Compare at $13,400
IGISave 69%6.3ct | Round | F | VS1 | Excellent
From $1,483
Compare at $4,785
IGISave 67.6%6.3ct | Round | F | VS2 | Excellent
From $1,488
Compare at $4,595
GIASave 72%6.31ct | Round | E | IF | Excellent
From $26,340
Compare at $94,000
IGISave 88.5%6.31ct | Round | G | VS2 | Ideal
From $1,520
Compare at $13,250
IGISave 88.3%6.31ct | Round | G | VS1 | Ideal
From $1,826
Compare at $15,550
IGISave 91.8%6.31ct | Round | E | VS1 | Ideal
From $1,576
Compare at $19,140
IGISave 81.4%6.31ct | Round | E | VVS2 | Excellent
From $2,442
Compare at $13,130
GIASave 72%6.31ct | Round | E | IF | Excellent
From $26,340
Compare at $94,000
Entry pricing in this category starts around $1,108.
What to Know When Shopping for 6.3 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $43,346 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 $2,031 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 80 comparable stones in this segment. Prices start around $1,108 and go up to $44,454.
Based on the latest market data, the average asking price is about $5,876 with a median around $2,031.
The observed spread is roughly $43,346 across tracked listings, which is about 97.5% 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 $2,031, 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 $43,346 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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