6.3 Carat Round Lab Grown Diamond Prices Comparison
As of May 2026, 6.3 carat round lab grown diamonds usually range from $560 to $59,211, with an average price of $6,122.In the last month, prices for these diamonds are down 4.9%.Compare 34 verified listings across 6 retailers tracked by CaratRadar.
6.3 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 34 verified 6.3-carat round lab grown diamonds listed across 6 online retailers. Prices in this segment range from $560 to $59,211, with an average asking price of $6,122 and a median of $3,941.
The price spread of $58,651 (99.1% 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.
34 diamonds tracked in this segment
Price range: $560 to $59,211
Average price: $6,122
Median price: $3,941
Available across 6 retailers
Savings potential: up to 99.1%
Price Range Overview
As of May 31, 2026Real market range for this carat, shape, and diamond type.
34
$560
$6,122
$3,941
$59,211
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 79.9%IGI | 6.4ct | Round | G | VS2 | Ideal
From $1,276
Compare at $6,360
Save 68.5%IGI | 6.3ct | Round | F | VVS2 | Excellent
From $1,313
Compare at $4,163
Save 73.2%IGI | 6.35ct | Round | E | VS1 | Excellent
From $1,335
Compare at $4,981
Save 76%IGI | 6.36ct | Round | E | VS2 | Excellent
From $1,359
Compare at $5,657
Save 62%IGI | 6.3ct | Round | F | VVS2 | Excellent
From $1,581
Compare at $4,163
Save 62%IGI | 6.32ct | Round | F | VVS2 | Ideal
From $1,587
Compare at $4,176
Save 57.5%IGI | 6.35ct | Round | E | VVS2 | Excellent
From $1,634
Compare at $3,849
Save 61.2%IGI | 6.3ct | Round | F | VS1 | Excellent
From $1,684
Compare at $4,345
Save 72.6%IGI | 6.33ct | Round | F | VVS2 | Excellent
From $1,696
Compare at $6,200
Save 65.1%IGI | 6.3ct | Round | E | VS2 | Excellent
From $1,812
Compare at $5,196
Save 79.2%IGI | 6.3ct | Round | G | VS1 | Ideal
From $2,138
Compare at $10,260
Save 29.9%IGI | 6.38ct | Round | E | VVS2 | Excellent
From $2,711
Compare at $3,865
Save 78.6%IGI | 6.32ct | Round | D | VS1 | Ideal
From $2,810
Compare at $13,150
Save 78.6%IGI | 6.32ct | Round | D | VS1 | Ideal
From $2,810
Compare at $13,150
Save 72.1%IGI | 6.31ct | Round | E | VVS2 | Excellent
From $3,103
Compare at $11,120
Save 56.8%IGI | 6.39ct | Round | I | VVS2 | Ideal
From $4,067
Compare at $9,410
Save 67%IGI | 6.31ct | Round | FANCY | VS1 | Ideal
From $4,249
Compare at $12,858
Save 67%IGI | 6.36ct | Round | FANCY | VS1 | Ideal
From $4,283
Compare at $12,960
Save 79.5%IGI | 6.38ct | Round | D | VVS2 | Excellent
From $4,642
Compare at $22,590
Save 39.7%IGI | 6.39ct | Round | G | VS1 | Ideal
From $5,571
Compare at $9,246
Save 42.2%IGI | 6.37ct | Round | F | VS1 | Ideal
From $6,105
Compare at $10,564
Save 42.3%IGI | 6.35ct | Round | E | VS1 | Ideal
From $6,688
Compare at $11,599
Save 42.3%IGI | 6.36ct | Round | E | VS1 | Ideal
From $6,698
Compare at $11,617
Save 68.6%IGI | 6.36ct | Round | D | VVS1 | Ideal
From $8,705
Compare at $27,700
Save 63.5%GIA | 6.35ct | Round | D | VVS1 | Excellent
From $10,095
Compare at $27,660
Save 78.3%IGI | 6.3ct | Round | G | IF | Ideal
From $13,207
Compare at $60,780
Save 73.8%IGI | 6.31ct | Round | E | IF | Ideal
From $15,081
Compare at $57,560
Save 73.8%IGI | 6.38ct | Round | E | IF | Ideal
From $15,249
Compare at $58,190
Save 73.6%IGI | 6.36ct | Round | D | IF | Ideal
From $17,493
Compare at $66,230
Save 72.2%IGI | 6.33ct | Round | D | IF | Ideal
From $17,945
Compare at $64,610
Save 79.9%GIA | 6.31ct | Round | E | IF | Excellent
From $19,147
Compare at $95,270
Save 79.9%GIA | 6.31ct | Round | E | IF | Excellent
From $19,147
Compare at $95,270
Save 78.7%GIA | 6.3ct | Round | D | FL | Excellent
From $27,147
Compare at $127,750
Save 34.4%GIA | 6.36ct | Round | D | FL | Ideal
From $39,862
Compare at $60,739
Entry pricing in this category starts around $560.
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 $58,651 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 $3,941 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 34 comparable stones in this segment. Prices start around $560 and go up to $59,211.
Based on the latest market data, the average asking price is about $6,122 with a median around $3,941.
The observed spread is roughly $58,651 across tracked listings, which is about 99.1% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $6,122. The median price is $3,941, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
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 $58,651 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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