5.9 Carat Round Lab Grown Diamond Prices Comparison
As of February 2026, 5.9 carat round lab grown diamonds usually range from $1,192 to $32,175, with an average price of $3,444.In the last month, prices for these diamonds are down 2.3%.Compare 163 verified listings across 9 retailers tracked by CaratRadar.
5.9 Carat Round Lab Grown Diamond Market Overview
CaratRadar currently tracks 163 verified 5.9-carat round lab grown diamonds listed across 9 online retailers. Prices in this segment range from $1,192 to $32,175, with an average asking price of $3,444 and a median of $1,648.
The price spread of $30,983 (96.3% 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.
163 diamonds tracked in this segment
Price range: $1,192 to $32,175
Average price: $3,444
Median price: $1,648
Available across 9 retailers
Savings potential: up to 96.3%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
163
$1,192
$3,444
$1,648
$32,175
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 10.8%5.85ct | Round | F | VS1 | Ideal
From $8,543
Compare at $9,581
IGISave 81.4%5.85ct | Round | G | VS1 | Ideal
From $1,357
Compare at $7,290
IGI5.85ct | Round | E | VVS2 | Ideal
From $10,489
Compare at $11,603
IGISave 89%5.85ct | Round | E | VVS2 | Excellent
From $1,909
Compare at $17,340
IGISave 70.1%5.85ct | Round | F | VS1 | Excellent
From $1,331
Compare at $4,445
IGISave 90.1%5.85ct | Round | G | VS1 | Ideal
From $1,427
Compare at $14,460
IGISave 91.9%5.85ct | Round | E | VVS2 | Excellent
From $1,404
Compare at $17,430
IGISave 70.8%5.85ct | Round | F | VS2 | Excellent
From $1,298
Compare at $4,445
IGISave 87.4%5.85ct | Round | E | VS1 | Excellent
From $1,909
Compare at $15,110
IGISave 89.6%5.85ct | Round | E | VS2 | Excellent
From $1,416
Compare at $13,590
IGISave 65.8%5.85ct | Round | D | VS1 | Excellent
From $2,039
Compare at $5,965
IGISave 68.6%5.85ct | Round | D | VS2 | Excellent
From $1,778
Compare at $5,670
IGISave 88.5%5.85ct | Round | E | VS2 | Excellent
From $1,557
Compare at $13,580
IGISave 72.3%5.85ct | Round | E | VS1 | Excellent
From $1,392
Compare at $5,030
IGISave 74.4%5.85ct | Round | F | IF | Ideal
From $13,257
Compare at $51,810
IGISave 81.3%5.85ct | Round | E | VS1 | Excellent
From $2,129
Compare at $11,370
IGISave 91.8%5.85ct | Round | E | VS1 | Ideal
From $1,385
Compare at $16,790
GIASave 73.4%5.85ct | Round | D | VVS1 | Excellent
From $12,420
Compare at $46,620
GIASave 74.1%5.85ct | Round | D | IF | Excellent
From $32,175
Compare at $123,990
IGISave 82.6%5.86ct | Round | F | VS1 | Excellent
From $2,093
Compare at $12,030
IGISave 64.7%5.86ct | Round | F | VS2 | Excellent
From $1,509
Compare at $4,275
GIASave 68.7%5.86ct | Round | E | VS1 | Excellent
From $4,743
Compare at $15,140
IGISave 72.9%5.86ct | Round | E | VVS2 | Excellent
From $3,168
Compare at $11,690
IGISave 90.9%5.86ct | Round | E | VS1 | Ideal
From $1,382
Compare at $15,200
IGISave 89.6%5.86ct | Round | E | VS1 | Excellent
From $1,576
Compare at $15,200
IGISave 91.8%5.86ct | Round | E | VVS2 | Ideal
From $1,423
Compare at $17,440
IGISave 82.5%5.86ct | Round | F | VS2 | Ideal
From $1,305
Compare at $7,440
IGISave 86.4%5.86ct | Round | F | VS1 | Ideal
From $1,340
Compare at $9,890
IGISave 71.1%5.86ct | Round | F | VS1 | Ideal
From $1,335
Compare at $4,625
IGISave 89%5.86ct | Round | E | VVS2 | Ideal
From $1,912
Compare at $17,370
IGISave 86%5.86ct | Round | E | VS1 | Ideal
From $2,116
Compare at $15,140
IGISave 89.1%5.86ct | Round | F | VS1 | Ideal
From $1,258
Compare at $11,500
IGISave 75.1%5.86ct | Round | E | VVS2 | Excellent
From $4,747
Compare at $19,070
IGISave 86.4%5.86ct | Round | H | VS1 | Ideal
From $1,366
Compare at $10,020
IGISave 79.7%5.86ct | Round | G | VS2 | Ideal
From $1,338
Compare at $6,600
IGISave 65.5%5.87ct | Round | F | VS2 | Excellent
From $1,459
Compare at $4,231
IGISave 91.3%5.87ct | Round | F | VVS2 | Ideal
From $1,488
Compare at $17,110
IGISave 72.1%5.87ct | Round | E | VS2 | Ideal
From $1,325
Compare at $4,750
GIASave 48.2%5.87ct | Round | D | VS1 | Ideal
From $17,700
Compare at $34,140
IGISave 87.4%5.87ct | Round | E | VS1 | Excellent
From $1,915
Compare at $15,170
IGISave 71.2%5.87ct | Round | F | VS1 | Ideal
From $1,334
Compare at $4,635
IGISave 90.5%5.87ct | Round | F | VVS2 | Ideal
From $1,471
Compare at $15,560
IGISave 89.1%5.87ct | Round | E | VVS2 | Excellent
From $1,907
Compare at $17,450
IGISave 90.9%5.87ct | Round | E | VS1 | Ideal
From $1,384
Compare at $15,230
IGISave 89.5%5.87ct | Round | E | VS1 | Ideal
From $1,596
Compare at $15,230
IGISave 87.2%5.87ct | Round | F | VS1 | Ideal
From $1,408
Compare at $10,980
IGISave 64.4%5.87ct | Round | D | VS1 | Excellent
From $2,045
Compare at $5,750
IGISave 89.6%5.87ct | Round | F | VVS2 | Ideal
From $1,612
Compare at $15,570
IGISave 77.8%5.87ct | Round | E | VVS2 | Ideal
From $1,915
Compare at $8,640
GIASave 80.8%5.87ct | Round | E | VVS1 | Excellent
From $9,927
Compare at $51,710
Entry pricing in this category starts around $1,192.
What to Know When Shopping for 5.9 Carat Round Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $30,983 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 $1,648 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 163 comparable stones in this segment. Prices start around $1,192 and go up to $32,175.
Based on the latest market data, the average asking price is about $3,444 with a median around $1,648.
The observed spread is roughly $30,983 across tracked listings, which is about 96.3% 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 $1,648, 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 9 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 $30,983 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.
Related Price Categories
Explore adjacent carat ranges and shapes to compare market shifts.
5.8 Carat Round Lab Grown Diamond Prices
6 Carat Round Lab Grown Diamond Prices
5.7 Carat Round Lab Grown Diamond Prices
6.1 Carat Round Lab Grown Diamond Prices
5.6 Carat Round Lab Grown Diamond Prices
6.2 Carat Round Lab Grown Diamond Prices
5.5 Carat Round Lab Grown Diamond Prices
5.9 Carat Oval Lab Grown Diamond Prices
5.9 Carat Princess Lab Grown Diamond Prices
5.9 Carat Radiant Lab Grown Diamond Prices
5.9 Carat Emerald Lab Grown Diamond Prices
5.9 Carat Cushion Lab Grown Diamond Prices
Tracking Lab Grown inventory for 5.9 carat Round diamonds.