5.9 Carat Radiant Lab Grown Diamond Prices Comparison
As of February 2026, 5.9 carat radiant lab grown diamonds usually range from $1,102 to $47,694, with an average price of $3,372.In the last month, prices for these diamonds are down 1.7%.Compare 45 verified listings across 5 retailers tracked by CaratRadar.
5.9 Carat Radiant Lab Grown Diamond Market Overview
CaratRadar currently tracks 45 verified 5.9-carat radiant lab grown diamonds listed across 5 online retailers. Prices in this segment range from $1,102 to $47,694, with an average asking price of $3,372 and a median of $1,708.
The price spread of $46,592 (97.7% 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.
45 diamonds tracked in this segment
Price range: $1,102 to $47,694
Average price: $3,372
Median price: $1,708
Available across 5 retailers
Savings potential: up to 97.7%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
45
$1,102
$3,372
$1,708
$47,694
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 85.1%5.85ct | Radiant | G | VS1 | Ideal
From $1,752
Compare at $11,780
IGISave 28.7%5.85ct | Radiant | D | VVS1 | Very Good
From $11,327
Compare at $15,893
IGISave 69.7%5.85ct | Radiant | F | VS1 | Ideal
From $3,627
Compare at $11,990
IGISave 89.8%5.85ct | Radiant | F | VS1 | Excellent
From $1,454
Compare at $14,230
GIASave 71.7%5.86ct | Radiant | G | VS1 | Ideal
From $2,860
Compare at $10,100
GIASave 56%5.86ct | Radiant | F | VS2 | Excellent
From $4,385
Compare at $9,962
IGISave 89.7%5.86ct | Radiant | E | VS1 | Excellent
From $1,635
Compare at $15,930
IGISave 61%5.86ct | Radiant | G | VS1 | Ideal
From $1,102
Compare at $2,823
IGISave 88.4%5.87ct | Radiant | G | VS2 | Ideal
From $1,254
Compare at $10,790
IGISave 89.8%5.87ct | Radiant | F | VS1 | Ideal
From $1,224
Compare at $12,030
IGISave 85.3%5.87ct | Radiant | F | VS1 | Very Good
From $1,224
Compare at $8,340
IGISave 84.6%5.87ct | Radiant | F | VS2 | Ideal
From $1,865
Compare at $12,110
IGISave 81.2%5.87ct | Radiant | F | VVS2 | Very Good
From $2,126
Compare at $11,310
IGISave 85.4%5.88ct | Radiant | E | VS1 | Ideal
From $2,126
Compare at $14,540
IGISave 84.8%5.88ct | Radiant | E | VVS2 | Excellent
From $2,204
Compare at $14,500
IGISave 89.6%5.88ct | Radiant | F | VVS2 | Very Good
From $1,536
Compare at $14,710
IGISave 89.8%5.89ct | Radiant | F | VVS2 | Excellent
From $1,508
Compare at $14,740
IGISave 86.5%5.89ct | Radiant | D | VS2 | Ideal
From $1,708
Compare at $12,610
IGISave 76.1%5.89ct | Radiant | F | VS2 | Ideal
From $1,623
Compare at $6,800
IGISave 72.6%5.89ct | Radiant | D | VVS1 | Ideal
From $5,331
Compare at $19,480
IGISave 89.6%5.89ct | Radiant | F | VS1 | Excellent
From $1,492
Compare at $14,320
IGISave 84.4%5.89ct | Radiant | G | VVS2 | Ideal
From $1,204
Compare at $7,730
GIASave 72%5.9ct | Radiant | D | FL | Ideal
From $47,694
Compare at $170,200
IGISave 88.3%5.9ct | Radiant | F | SI1 | Ideal
From $1,223
Compare at $10,480
IGISave 67%5.9ct | Radiant | F | VS2 | Ideal
From $1,477
Compare at $4,480
IGISave 85.2%5.9ct | Radiant | G | VS1 | Ideal
From $1,767
Compare at $11,930
IGISave 47.1%5.9ct | Radiant | E | VVS2 | Very Good
From $2,912
Compare at $5,509
IGISave 85.2%5.91ct | Radiant | G | VS1 | Ideal
From $1,770
Compare at $11,940
IGISave 80.3%5.91ct | Radiant | E | VS1 | Ideal
From $1,784
Compare at $9,060
IGISave 88.7%5.91ct | Radiant | F | VS2 | Ideal
From $1,170
Compare at $10,370
IGISave 86%5.91ct | Radiant | E | VVS2 | Ideal
From $2,039
Compare at $14,580
IGISave 89.8%5.91ct | Radiant | F | VS1 | Excellent
From $1,466
Compare at $14,320
IGISave 69.7%5.91ct | Radiant | E | VS1 | Excellent
From $1,488
Compare at $4,905
IGISave 86.1%5.91ct | Radiant | G | VS2 | Ideal
From $1,506
Compare at $10,870
IGISave 86.9%5.91ct | Radiant | G | VVS2 | Ideal
From $1,535
Compare at $11,710
IGISave 88.7%5.92ct | Radiant | G | VVS2 | Excellent
From $1,327
Compare at $11,710
IGISave 88.1%5.92ct | Radiant | E | VS2 | Ideal
From $1,600
Compare at $13,400
IGISave 86.6%5.92ct | Radiant | D | VS1 | Ideal
From $2,291
Compare at $17,150
IGISave 68.1%5.92ct | Radiant | FANCY | VS1 | Excellent
From $3,689
Compare at $11,560
IGISave 78.6%5.93ct | Radiant | E | VVS2 | Ideal
From $3,128
Compare at $14,630
IGISave 49.3%5.94ct | Radiant | F | VVS2 | Ideal
From $9,073
Compare at $17,908
IGISave 80.9%5.94ct | Radiant | F | VS2 | Very Good
From $2,064
Compare at $10,830
IGISave 72.2%5.94ct | Radiant | F | VVS2 | Very Good
From $3,179
Compare at $11,440
IGISave 87.6%5.94ct | Radiant | G | VVS2 | Excellent
From $1,453
Compare at $11,740
IGISave 88.5%5.95ct | Radiant | E | VS2 | Excellent
From $1,528
Compare at $13,330
Entry pricing in this category starts around $1,102.
What to Know When Shopping for 5.9 Carat Radiant Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $46,592 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 $1,708 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 $1,102 and go up to $47,694.
Based on the latest market data, the average asking price is about $3,372 with a median around $1,708.
The observed spread is roughly $46,592 across tracked listings, which is about 97.7% 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 $1,708, 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 $46,592 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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