5.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 5.8 carat cushion lab grown diamonds usually range from $1,158 to $23,932, with an average price of $2,989.In the last month, prices for these diamonds are down 3%.Compare 46 verified listings across 6 retailers tracked by CaratRadar.
5.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 46 verified 5.8-carat cushion lab grown diamonds listed across 6 online retailers. Prices in this segment range from $1,158 to $23,932, with an average asking price of $2,989 and a median of $1,827.
The price spread of $22,774 (95.2% 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.
46 diamonds tracked in this segment
Price range: $1,158 to $23,932
Average price: $2,989
Median price: $1,827
Available across 6 retailers
Savings potential: up to 95.2%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
46
$1,158
$2,989
$1,827
$23,932
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 88.2%5.75ct | Cushion | G | VS1 | Ideal
From $1,377
Compare at $11,640
IGISave 80.1%5.75ct | Cushion | F | VVS2 | Ideal
From $1,579
Compare at $7,920
IGISave 87.2%5.75ct | Cushion | D | VS2 | Excellent
From $1,604
Compare at $12,490
IGISave 45%5.75ct | Cushion | E | VS1 | Very Good
From $1,828
Compare at $3,322
GIASave 62.4%5.75ct | Cushion | E | VVS2 | Ideal
From $5,408
Compare at $14,380
IGISave 36.3%5.75ct | Cushion | I | VS1 | Ideal
From $2,003
Compare at $3,142
IGISave 85.2%5.75ct | Cushion | G | VS1 | Ideal
From $1,722
Compare at $11,640
IGISave 85.8%5.75ct | Cushion | G | VVS2 | Excellent
From $1,610
Compare at $11,360
IGISave 84.7%5.75ct | Cushion | G | VS1 | Ideal
From $1,576
Compare at $10,320
IGISave 85.2%5.75ct | Cushion | G | VS1 | Ideal
From $1,722
Compare at $11,640
IGISave 88.2%5.75ct | Cushion | E | VS1 | Ideal
From $1,870
Compare at $15,830
IGISave 85.2%5.76ct | Cushion | G | VS1 | Ideal
From $1,725
Compare at $11,660
IGISave 89.8%5.76ct | Cushion | E | VS1 | Ideal
From $1,589
Compare at $15,650
IGISave 86.9%5.76ct | Cushion | E | VVS2 | Excellent
From $1,891
Compare at $14,450
IGISave 19.3%5.76ct | Cushion | E | VS2 | Very Good
From $1,310
Compare at $1,622
IGISave 62%5.76ct | Cushion | F | VVS2 | Excellent
From $1,825
Compare at $4,803
IGISave 87.9%5.76ct | Cushion | G | VS1 | Ideal
From $1,409
Compare at $11,660
IGISave 85.2%5.77ct | Cushion | G | VS1 | Ideal
From $1,728
Compare at $11,680
IGISave 81.2%5.78ct | Cushion | F | VVS2 | Very Good
From $2,097
Compare at $11,130
IGISave 84.9%5.78ct | Cushion | F | VVS2 | Ideal
From $2,216
Compare at $14,720
IGISave 85.2%5.78ct | Cushion | G | VS1 | Ideal
From $1,731
Compare at $11,700
IGISave 83.8%5.78ct | Cushion | F | VS1 | Ideal
From $2,142
Compare at $13,190
IGISave 16%5.79ct | Cushion | G | VS1 | Very Good
From $1,158
Compare at $1,379
IGISave 84.3%5.79ct | Cushion | I | VVS2 | Ideal
From $1,341
Compare at $8,540
IGISave 86.8%5.79ct | Cushion | F | VS1 | Ideal
From $1,738
Compare at $13,210
IGISave 83.8%5.79ct | Cushion | F | VS1 | Ideal
From $2,145
Compare at $13,210
IGISave 85.2%5.8ct | Cushion | G | VS1 | Ideal
From $1,737
Compare at $11,740
IGISave 88.9%5.8ct | Cushion | F | VS1 | Excellent
From $1,329
Compare at $11,930
IGISave 42.2%5.8ct | Cushion | F | VVS2 | Very Good
From $1,300
Compare at $2,250
IGISave 85.2%5.8ct | Cushion | G | VS1 | Ideal
From $1,737
Compare at $11,740
GIASave 62.1%5.8ct | Cushion | F | VS1 | Ideal
From $6,496
Compare at $17,150
GIASave 52.9%5.8ct | Cushion | E | VVS2 | Excellent
From $6,836
Compare at $14,510
IGISave 36.4%5.81ct | Cushion | I | VS2 | Ideal
From $1,898
Compare at $2,983
IGISave 83.8%5.81ct | Cushion | F | VS1 | Ideal
From $2,153
Compare at $13,260
IGISave 72.2%5.81ct | Cushion | F | VS1 | Ideal
From $2,051
Compare at $7,370
GIASave 58.7%5.81ct | Cushion | E | VS1 | Excellent
From $5,956
Compare at $14,420
IGISave 83.8%5.81ct | Cushion | F | VS1 | Ideal
From $2,153
Compare at $13,260
IGISave 86.2%5.81ct | Cushion | E | VS1 | Very Good
From $1,985
Compare at $14,370
IGISave 61.5%5.81ct | Cushion | E | VVS2 | Excellent
From $1,455
Compare at $3,780
IGISave 84.7%5.82ct | Cushion | E | VVS2 | Very Good
From $2,235
Compare at $14,600
IGISave 45.8%5.82ct | Cushion | F | VVS2 | Ideal
From $7,027
Compare at $12,970
IGISave 83.8%5.82ct | Cushion | F | VS1 | Ideal
From $2,156
Compare at $13,280
GIASave 77.4%5.82ct | Cushion | F | VS1 | Ideal
From $4,669
Compare at $20,630
IGISave 45.2%5.83ct | Cushion | D | VVS1 | Ideal
From $23,932
Compare at $43,661
IGISave 29%5.83ct | Cushion | E | VVS2 | Ideal
From $10,320
Compare at $14,530
IGISave 85.2%5.83ct | Cushion | G | VS1 | Ideal
From $1,746
Compare at $11,800
Entry pricing in this category starts around $1,158.
What to Know When Shopping for 5.8 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $22,774 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 $1,827 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.
- Cushion cuts come in standard and modified brilliant varieties. Modified brilliants tend to show more fire, while standard cushions have broader facets.
Frequently Asked Questions
We currently track 46 comparable stones in this segment. Prices start around $1,158 and go up to $23,932.
Based on the latest market data, the average asking price is about $2,989 with a median around $1,827.
The observed spread is roughly $22,774 across tracked listings, which is about 95.2% 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 $1,827, 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 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 $22,774 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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