3.8 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 3.8 carat radiant lab grown diamonds usually range from $770 to $20,163, with an average price of $2,263.In the last month, prices for these diamonds are down 5.3%.Compare 542 verified listings across 12 retailers tracked by CaratRadar.
3.8 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 542 verified 3.8-carat radiant lab grown diamonds listed across 12 online retailers. Prices in this segment range from $770 to $20,163, with an average asking price of $2,263 and a median of $1,310.
The price spread of $19,393 (96.2% 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.
542 diamonds tracked in this segment
Price range: $770 to $20,163
Average price: $2,263
Median price: $1,310
Available across 12 retailers
Savings potential: up to 96.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
542
$770
$2,263
$1,310
$20,163
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 64.5%3.75ct | Radiant | E | VS1 | Very Good
From $1,146
Compare at $3,225
IGISave 76.1%3.75ct | Radiant | E | VVS2 | Ideal
From $1,789
Compare at $7,480
IGISave 78.4%3.75ct | Radiant | E | VS1 | Ideal
From $1,216
Compare at $5,620
IGISave 76.4%3.75ct | Radiant | E | IF | Excellent
From $3,196
Compare at $13,560
IGISave 68.1%3.75ct | Radiant | D | VVS2 | Very Good
From $1,447
Compare at $4,535
IGISave 60.2%3.75ct | Radiant | E | VS2 | Very Good
From $1,334
Compare at $3,356
IGISave 83.3%3.75ct | Radiant | G | VVS2 | Excellent
From $770
Compare at $4,600
GIASave 71.1%3.75ct | Radiant | D | FL | Excellent
From $20,163
Compare at $69,740
GIASave 71.8%3.75ct | Radiant | E | VS1 | Ideal
From $2,458
Compare at $8,720
GIASave 72.8%3.75ct | Radiant | E | VVS2 | Ideal
From $2,441
Compare at $8,990
GIASave 60.7%3.75ct | Radiant | E | VVS2 | Excellent
From $4,033
Compare at $10,271
IGISave 65.6%3.75ct | Radiant | E | VS1 | Very Good
From $1,141
Compare at $3,316
IGISave 82.3%3.75ct | Radiant | D | IF | Ideal
From $5,116
Compare at $28,870
IGISave 83.8%3.75ct | Radiant | E | VVS2 | Ideal
From $1,144
Compare at $7,060
IGISave 82.6%3.75ct | Radiant | F | VS1 | Excellent
From $936
Compare at $5,380
IGISave 66.6%3.75ct | Radiant | F | VVS2 | Excellent
From $906
Compare at $2,709
GIASave 56.7%3.75ct | Radiant | F | VVS1 | Excellent
From $3,916
Compare at $9,040
IGISave 85.7%3.75ct | Radiant | F | VS1 | Excellent
From $1,057
Compare at $7,370
IGISave 47.3%3.75ct | Radiant | D | VVS1 | Excellent
From $2,720
Compare at $5,162
IGISave 86.7%3.75ct | Radiant | G | VVS2 | Very Good
From $933
Compare at $7,000
IGISave 83.5%3.75ct | Radiant | E | VVS2 | Excellent
From $1,236
Compare at $7,480
IGISave 70.6%3.75ct | Radiant | E | VVS2 | Very Good
From $1,170
Compare at $3,975
IGISave 75.5%3.75ct | Radiant | G | VS1 | Very Good
From $1,763
Compare at $7,200
IGISave 65.2%3.75ct | Radiant | E | VS1 | Very Good
From $1,121
Compare at $3,225
IGISave 62.4%3.75ct | Radiant | F | VS2 | Very Good
From $1,071
Compare at $2,850
IGISave 67.8%3.75ct | Radiant | E | VVS2 | Very Good
From $1,280
Compare at $3,975
IGISave 29.8%3.75ct | Radiant | E | VS1 | Very Good
From $1,730
Compare at $2,465
IGISave 74%3.75ct | Radiant | E | VVS1 | Ideal
From $2,661
Compare at $10,240
IGISave 61.6%3.75ct | Radiant | E | VVS2 | Very Good
From $2,134
Compare at $5,560
IGISave 85.5%3.75ct | Radiant | D | VVS2 | Excellent
From $1,409
Compare at $9,726
IGISave 66.6%3.75ct | Radiant | E | VVS2 | Excellent
From $951
Compare at $2,851
IGISave 76.4%3.75ct | Radiant | F | VS2 | Ideal
From $1,058
Compare at $4,480
IGISave 77.8%3.75ct | Radiant | E | VS1 | Very Good
From $1,729
Compare at $7,786
IGISave 74.6%3.75ct | Radiant | D | VVS2 | Very Good
From $2,028
Compare at $7,970
3.75ct | Radiant | E | VS1 | Very Good
From $1,146
Compare at $3,110
IGISave 65.2%3.75ct | Radiant | E | VS1 | Ideal
From $1,121
Compare at $3,225
3.75ct | Radiant | F | VS1 | Very Good
From $1,107
Compare at $7,370
IGISave 75.6%3.75ct | Radiant | G | VVS2 | Ideal
From $1,343
Compare at $5,500
IGISave 82.5%3.75ct | Radiant | F | VS1 | Ideal
From $1,181
Compare at $6,730
IGISave 74.3%3.75ct | Radiant | D | IF | Excellent
From $6,520
Compare at $25,393
IGISave 85.4%3.75ct | Radiant | D | VS1 | Excellent
From $1,325
Compare at $9,100
IGISave 77.2%3.75ct | Radiant | D | VVS2 | Excellent
From $2,058
Compare at $9,010
GIASave 82.8%3.75ct | Radiant | G | VVS2 | Excellent
From $2,345
Compare at $13,640
GIASave 71.6%3.75ct | Radiant | E | VVS2 | Excellent
From $2,611
Compare at $9,193
GIASave 65.6%3.75ct | Radiant | D | VVS1 | Excellent
From $3,765
Compare at $10,945
GIASave 83.1%3.75ct | Radiant | E | VVS2 | Excellent
From $2,466
Compare at $14,620
GIASave 71.1%3.75ct | Radiant | E | VVS2 | Excellent
From $2,611
Compare at $9,040
IGISave 32.5%3.76ct | Radiant | F | VVS2 | Ideal
From $2,417
Compare at $3,583
IGISave 67.8%3.76ct | Radiant | E | VVS2 | Very Good
From $1,283
Compare at $3,985
IGISave 69.8%3.76ct | Radiant | D | VVS2 | Very Good
From $1,429
Compare at $4,735
Entry pricing in this category starts around $770.
What to Know When Shopping for 3.8 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $19,393 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 $1,310 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 542 comparable stones in this segment. Prices start around $770 and go up to $20,163.
Based on the latest market data, the average asking price is about $2,263 with a median around $1,310.
The observed spread is roughly $19,393 across tracked listings, which is about 96.2% 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 $1,310, 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 12 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 $19,393 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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