5.8 Carat Cushion Lab Grown Diamond Prices Comparison
As of April 2026, 5.8 carat cushion lab grown diamonds usually range from $985 to $33,419, with an average price of $5,491.In the last month, prices for these diamonds are down 2%.Compare 43 verified listings across 5 retailers tracked by CaratRadar.
5.8 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 43 verified 5.8-carat cushion lab grown diamonds listed across 5 online retailers. Prices in this segment range from $985 to $33,419, with an average asking price of $5,491 and a median of $4,119.
The price spread of $32,434 (97.1% 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.
43 diamonds tracked in this segment
Price range: $985 to $33,419
Average price: $5,491
Median price: $4,119
Available across 5 retailers
Savings potential: up to 97.1%
Price Range Overview
As of Apr 14, 2026Real market range for this carat, shape, and diamond type.
43
$985
$5,491
$4,119
$33,419
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
Save 37.2%GIA | 5.8ct | Cushion | F | VS1 | Ideal
From $6,496
Compare at $10,350
Save 51.7%GIA | 5.8ct | Cushion | E | VVS2 | Excellent
From $7,010
Compare at $14,510
Save 70.8%IGI | 5.8ct | Cushion | G | VS1 | Ideal
From $1,737
Compare at $5,950
Save 72.7%IGI | 5.8ct | Cushion | G | VS1 | Ideal
From $1,737
Compare at $6,370
Save 86.9%IGI | 5.8ct | Cushion | F | VS1 | Excellent
From $1,564
Compare at $11,930
Save 30.2%IGI | 5.8ct | Cushion | F | VVS2 | Very Good
From $1,588
Compare at $2,274
Save 52.5%GIA | 5.81ct | Cushion | E | VS1 | Excellent
From $6,845
Compare at $14,420
IGI | 5.81ct | Cushion | I | VS2 | Ideal
From $1,898
Compare at $1,900
Save 69.1%IGI | 5.81ct | Cushion | F | VS1 | Ideal
From $2,153
Compare at $6,960
Save 71.1%IGI | 5.81ct | Cushion | F | VS1 | Ideal
From $2,153
Compare at $7,450
Save 87.1%IGI | 5.81ct | Cushion | E | VS1 | Very Good
From $1,861
Compare at $14,370
Save 43.2%IGI | 5.81ct | Cushion | E | VVS2 | Excellent
From $1,680
Compare at $2,959
Save 72.9%IGI | 5.82ct | Cushion | F | VS1 | Ideal
From $2,156
Compare at $7,960
Save 42.3%IGI | 5.82ct | Cushion | F | VVS2 | Ideal
From $7,486
Compare at $12,970
Save 75.9%IGI | 5.82ct | Cushion | F | VVS2 | Excellent
From $1,815
Compare at $7,530
Save 84.1%IGI | 5.82ct | Cushion | E | VVS2 | Very Good
From $2,312
Compare at $14,510
Save 84.5%IGI | 5.82ct | Cushion | F | VS2 | Very Good
From $1,587
Compare at $10,270
Save 74.4%IGI | 5.83ct | Cushion | G | VS1 | Ideal
From $1,746
Compare at $6,830
Save 29%IGI | 5.83ct | Cushion | E | VVS2 | Ideal
From $10,320
Compare at $14,530
Save 73.4%IGI | 5.83ct | Cushion | D | VVS1 | Ideal
From $11,600
Compare at $43,661
IGI | 5.83ct | Cushion | E | VS1 | Very Good
From $1,460
Compare at $14,470
Save 52.2%GIA | 5.85ct | Cushion | F | VS2 | Ideal
From $8,784
Compare at $18,390
Save 70.2%IGI | 5.85ct | Cushion | E | VS1 | Very Good
From $2,792
Compare at $9,360
Save 75.9%IGI | 5.85ct | Cushion | F | VVS2 | Very Good
From $1,841
Compare at $7,640
Save 72.1%IGI | 5.85ct | Cushion | D | VVS2 | Ideal
From $5,060
Compare at $18,120
Save 77.2%IGI | 5.86ct | Cushion | F | VS1 | Ideal
From $2,171
Compare at $9,510
Save 74.5%IGI | 5.86ct | Cushion | F | VS1 | Ideal
From $2,171
Compare at $8,510
Save 75.9%IGI | 5.86ct | Cushion | F | VS1 | Ideal
From $2,171
Compare at $9,000
Save 70.3%IGI | 5.86ct | Cushion | F | VVS2 | Very Good
From $2,662
Compare at $8,970
Save 75.9%IGI | 5.86ct | Cushion | E | VS1 | Excellent
From $1,845
Compare at $7,660
Save 78.3%IGI | 5.87ct | Cushion | F | VS1 | Ideal
From $2,175
Compare at $10,020
Save 74.7%IGI | 5.87ct | Cushion | D | VVS1 | Very Good
From $10,147
Compare at $40,170
Save 82.5%IGI | 5.88ct | Cushion | G | VS2 | Ideal
From $1,673
Compare at $9,570
Save 85.6%IGI | 5.89ct | Cushion | E | VS1 | Good
From $2,112
Compare at $14,650
Save 85.5%IGI | 5.89ct | Cushion | E | VVS2 | Excellent
From $1,895
Compare at $13,045
Save 85.6%IGI | 5.89ct | Cushion | E | VS1 | Very Good
From $2,112
Compare at $14,650
Save 68%IGI | 5.89ct | Cushion | E | VS2 | Ideal
From $1,526
Compare at $4,770
Save 79.7%IGI | 5.89ct | Cushion | E | VVS2 | Very Good
From $2,987
Compare at $14,730
Save 71.1%IGI | 5.9ct | Cushion | F | VS1 | Ideal
From $2,186
Compare at $7,570
Save 82.9%IGI | 5.9ct | Cushion | F | VVS2 | Ideal
From $2,261
Compare at $13,220
Save 73.6%IGI | 5.9ct | Cushion | E | VVS2 | Ideal
From $3,883
Compare at $14,710
Save 77.2%IGI | 5.9ct | Cushion | E | VVS2 | Very Good
From $1,825
Compare at $8,000
Save 41.9%IGI | 5.9ct | Cushion | F | SI1 | Very Good
From $1,573
Compare at $2,709
Entry pricing in this category starts around $985.
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 $32,434 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 $4,119 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 43 comparable stones in this segment. Prices start around $985 and go up to $33,419.
Based on the latest market data, the average asking price is about $5,491 with a median around $4,119.
The observed spread is roughly $32,434 across tracked listings, which is about 97.1% 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 $4,119, 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 $32,434 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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