4.9 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 4.9 carat radiant lab grown diamonds usually range from $874 to $26,890, with an average price of $2,170.In the last month, prices for these diamonds are down 1.3%.Compare 184 verified listings across 8 retailers tracked by CaratRadar.
4.9 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 184 verified 4.9-carat radiant lab grown diamonds listed across 8 online retailers. Prices in this segment range from $874 to $26,890, with an average asking price of $2,170 and a median of $1,369.
The price spread of $26,016 (96.7% 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.
184 diamonds tracked in this segment
Price range: $874 to $26,890
Average price: $2,170
Median price: $1,369
Available across 8 retailers
Savings potential: up to 96.7%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
184
$874
$2,170
$1,369
$26,890
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 69.8%4.85ct | Radiant | D | VVS1 | Excellent
From $4,727
Compare at $15,630
IGISave 71.2%4.85ct | Radiant | F | VVS2 | Ideal
From $2,615
Compare at $9,090
IGISave 76.2%4.85ct | Radiant | G | VVS2 | Very Good
From $1,570
Compare at $6,590
IGISave 74.7%4.85ct | Radiant | F | VS2 | Ideal
From $1,389
Compare at $5,490
IGISave 80.1%4.85ct | Radiant | E | VS1 | Ideal
From $1,443
Compare at $7,250
IGISave 83%4.85ct | Radiant | F | VS1 | Ideal
From $989
Compare at $5,820
IGISave 82.1%4.85ct | Radiant | E | VS1 | Ideal
From $1,528
Compare at $8,540
IGISave 85.6%4.85ct | Radiant | E | VVS2 | Ideal
From $1,364
Compare at $9,448
IGISave 82.7%4.85ct | Radiant | E | SI1 | Very Good
From $1,365
Compare at $7,900
IGISave 89%4.85ct | Radiant | E | VS2 | Ideal
From $974
Compare at $8,840
IGISave 89.5%4.85ct | Radiant | E | VS2 | Ideal
From $974
Compare at $9,300
IGISave 62.1%4.85ct | Radiant | F | VS1 | Very Good
From $1,480
Compare at $3,903
IGISave 59.8%4.85ct | Radiant | E | VS1 | Ideal
From $1,380
Compare at $3,437
IGISave 87.3%4.85ct | Radiant | F | VVS2 | Very Good
From $1,343
Compare at $10,560
IGISave 78.4%4.85ct | Radiant | E | VS2 | Very Good
From $1,320
Compare at $6,110
IGISave 84.2%4.85ct | Radiant | E | VS2 | Ideal
From $1,289
Compare at $8,160
IGISave 83.7%4.85ct | Radiant | E | VS2 | Ideal
From $942
Compare at $5,770
IGISave 87.8%4.85ct | Radiant | D | VS1 | Ideal
From $1,539
Compare at $12,620
IGISave 87.2%4.85ct | Radiant | F | SI1 | Ideal
From $1,000
Compare at $7,830
IGISave 81.1%4.85ct | Radiant | E | VVS2 | Ideal
From $1,863
Compare at $9,850
IGISave 88.8%4.85ct | Radiant | D | VS2 | Ideal
From $1,153
Compare at $10,280
GCALSave 70.9%4.85ct | Radiant | D | VVS2 | Excellent
From $2,933
Compare at $10,090
IGISave 77%4.86ct | Radiant | E | VVS2 | Ideal
From $1,867
Compare at $8,100
IGISave 67.6%4.86ct | Radiant | E | VS1 | Very Good
From $1,353
Compare at $4,175
GIASave 69.2%4.86ct | Radiant | E | VVS2 | Ideal
From $7,727
Compare at $25,080
IGISave 88.8%4.86ct | Radiant | F | SI1 | Ideal
From $874
Compare at $7,840
IGISave 73.7%4.86ct | Radiant | F | VS1 | Ideal
From $1,674
Compare at $6,370
IGISave 85.4%4.86ct | Radiant | F | VS1 | Ideal
From $984
Compare at $6,720
IGISave 88.7%4.86ct | Radiant | F | VS1 | Very Good
From $1,149
Compare at $10,200
IGISave 76.2%4.86ct | Radiant | D | IF | Ideal
From $16,008
Compare at $67,290
IGISave 85.1%4.86ct | Radiant | E | VS1 | Ideal
From $1,242
Compare at $8,347
IGISave 83%4.86ct | Radiant | F | VS1 | Ideal
From $990
Compare at $5,830
IGISave 19%4.86ct | Radiant | H | VS2 | Ideal
From $1,028
Compare at $1,270
GCALSave 77.2%4.86ct | Radiant | D | VVS1 | Excellent
From $7,829
Compare at $34,320
IGISave 84.7%4.87ct | Radiant | E | VS2 | Ideal
From $960
Compare at $6,290
IGISave 87.2%4.87ct | Radiant | E | VS2 | Ideal
From $960
Compare at $7,500
IGISave 50.6%4.87ct | Radiant | E | VS2 | Ideal
From $3,108
Compare at $6,290
IGISave 79%4.87ct | Radiant | E | VVS2 | Excellent
From $2,337
Compare at $11,150
IGISave 86%4.87ct | Radiant | E | VS2 | Ideal
From $953
Compare at $6,820
IGISave 80.8%4.87ct | Radiant | E | VS1 | Very Good
From $1,761
Compare at $9,170
IGISave 87.1%4.87ct | Radiant | E | VVS2 | Ideal
From $1,592
Compare at $12,380
IGISave 84.7%4.87ct | Radiant | E | VS2 | Ideal
From $938
Compare at $6,140
GIASave 73.7%4.87ct | Radiant | E | VS2 | Excellent
From $3,519
Compare at $13,382
IGISave 23.6%4.88ct | Radiant | E | VS2 | Ideal
From $1,827
Compare at $2,391
IGISave 65.5%4.88ct | Radiant | E | VS1 | Very Good
From $1,182
Compare at $3,427
IGISave 85.3%4.88ct | Radiant | D | VS1 | Very Good
From $1,871
Compare at $12,690
IGISave 83.5%4.88ct | Radiant | D | VS2 | Very Good
From $1,832
Compare at $11,100
IGISave 84.1%4.88ct | Radiant | F | VS1 | Ideal
From $963
Compare at $6,040
IGISave 80.6%4.88ct | Radiant | E | VS1 | Very Good
From $1,418
Compare at $7,300
IGISave 83%4.88ct | Radiant | F | VS1 | Ideal
From $1,269
Compare at $7,470
Entry pricing in this category starts around $874.
What to Know When Shopping for 4.9 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $26,016 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 $1,369 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 184 comparable stones in this segment. Prices start around $874 and go up to $26,890.
Based on the latest market data, the average asking price is about $2,170 with a median around $1,369.
The observed spread is roughly $26,016 across tracked listings, which is about 96.7% 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 $1,369, 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 8 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 $26,016 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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