3.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of May 2026, 3.5 carat cushion lab grown diamonds usually range from $558 to $18,305, with an average price of $3,426.In the last month, prices for these diamonds are down 8.4%.Compare 1,071 verified listings across 10 retailers tracked by CaratRadar.
3.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 1,071 verified 3.5-carat cushion lab grown diamonds listed across 10 online retailers. Prices in this segment range from $558 to $18,305, with an average asking price of $3,426 and a median of $2,374.
The price spread of $17,747 (97.0% 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.
1,071 diamonds tracked in this segment
Price range: $558 to $18,305
Average price: $3,426
Median price: $2,374
Available across 10 retailers
Savings potential: up to 97.0%
Price Range Overview
As of May 29, 2026Real market range for this carat, shape, and diamond type.
1,071
$558
$3,426
$2,374
$18,305
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 60.3%IGI | 3.56ct | Cushion | G | VS2 | Very Good
From $636
Compare at $1,604
Save 59.7%IGI | 3.53ct | Cushion | G | VS1 | Very Good
From $641
Compare at $1,590
Save 64.9%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $664
Compare at $1,894
Save 64.9%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $664
Compare at $1,894
Save 71.9%IGI | 3.51ct | Cushion | F | VS2 | Very Good
From $666
Compare at $2,370
Save 46.7%IGI | 3.51ct | Cushion | I | VS1 | Ideal
From $668
Compare at $1,253
Save 70%IGI | 3.53ct | Cushion | H | VS1 | Ideal
From $672
Compare at $2,243
Save 71.9%IGI | 3.5ct | Cushion | F | VS1 | Very Good
From $680
Compare at $2,418
Save 79.9%IGI | 3.51ct | Cushion | J | VS2 | Ideal
From $688
Compare at $3,420
Save 61.4%IGI | 3.56ct | Cushion | E | VS2 | Very Good
From $694
Compare at $1,798
Save 60.2%IGI | 3.53ct | Cushion | F | VS1 | Very Good
From $717
Compare at $1,801
Save 59.5%IGI | 3.5ct | Cushion | F | VS1 | Very Good
From $719
Compare at $1,774
Save 57.2%IGI | 3.58ct | Cushion | G | VS1 | Very Good
From $719
Compare at $1,681
Save 62.2%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $719
Compare at $1,902
Save 59.6%IGI | 3.51ct | Cushion | F | VS1 | Very Good
From $721
Compare at $1,783
Save 64.9%IGI | 3.51ct | Cushion | D | VS2 | Very Good
From $721
Compare at $2,057
Save 58.8%IGI | 3.51ct | Cushion | E | VS2 | Very Good
From $728
Compare at $1,767
Save 62.1%IGI | 3.52ct | Cushion | E | VS1 | Very Good
From $730
Compare at $1,924
Save 61.5%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $730
Compare at $1,894
Save 60.4%IGI | 3.58ct | Cushion | F | VS1 | Very Good
From $733
Compare at $1,851
Save 61.8%IGI | 3.54ct | Cushion | E | VS1 | Very Good
From $743
Compare at $1,947
Save 61.8%IGI | 3.54ct | Cushion | E | VS1 | Very Good
From $743
Compare at $1,947
Save 61.3%IGI | 3.51ct | Cushion | F | VVS2 | Very Good
From $744
Compare at $1,924
Save 62%IGI | 3.56ct | Cushion | E | VS1 | Very Good
From $747
Compare at $1,968
Save 72.4%IGI | 3.54ct | Cushion | FANCY | VS1 | Very Good
From $751
Compare at $2,719
Save 30.5%IGI | 3.54ct | Cushion | F | VVS2 | Very Good
From $751
Compare at $1,080
Save 31.2%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $753
Compare at $1,094
Save 62.3%IGI | 3.6ct | Cushion | E | VS1 | Excellent
From $754
Compare at $2,002
Save 58.5%IGI | 3.55ct | Cushion | E | VS2 | Very Good
From $754
Compare at $1,815
Save 31.1%IGI | 3.59ct | Cushion | G | VS1 | Ideal
From $756
Compare at $1,097
Save 60.4%IGI | 3.5ct | Cushion | E | VS1 | Very Good
From $756
Compare at $1,911
Save 53.2%IGI | 3.5ct | Cushion | G | VS2 | Very Good
From $756
Compare at $1,614
Save 57.5%IGI | 3.53ct | Cushion | G | VVS2 | Very Good
From $765
Compare at $1,799
Save 61%IGI | 3.56ct | Cushion | E | VS1 | Very Good
From $769
Compare at $1,973
Save 58.5%IGI | 3.59ct | Cushion | G | VVS2 | Very Good
From $770
Compare at $1,856
Save 61.8%IGI | 3.56ct | Cushion | E | VS1 | Excellent
From $770
Compare at $2,015
Save 62.1%IGI | 3.51ct | Cushion | F | VS2 | Ideal
From $771
Compare at $2,033
Save 74.9%IGI | 3.51ct | Cushion | H | VS1 | Excellent
From $774
Compare at $3,080
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Ideal
From $777
Compare at $1,975
Save 60.7%IGI | 3.56ct | Cushion | E | VS1 | Very Good
From $777
Compare at $1,975
Save 13.8%IGI | 3.52ct | Cushion | G | VS2 | Very Good
From $778
Compare at $903
Save 30%IGI | 3.54ct | Cushion | F | VVS2 | Very Good
From $780
Compare at $1,114
Save 77.9%IGI | 3.5ct | Cushion | D | VS2 | Very Good
From $781
Compare at $3,535
Save 60.9%IGI | 3.58ct | Cushion | E | VS1 | Ideal
From $781
Compare at $1,997
Entry pricing in this category starts around $558.
What to Know When Shopping for 3.5 Carat Cushion Lab Grown Diamonds
- Always compare identical certified diamonds across retailers. Identical certificate numbers can have price differences of $17,747 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 $2,374 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 1,071 comparable stones in this segment. Prices start around $558 and go up to $18,305.
Based on the latest market data, the average asking price is about $3,426 with a median around $2,374.
The observed spread is roughly $17,747 across tracked listings, which is about 97.0% from highest to lowest offer in this bucket.
We refresh pricing data daily so these pages stay current with market changes.
Based on completed market data, the fair market benchmark is $3,426. The median price is $2,374, so offers between the median and fair benchmark can be reasonable, while reputable listings below the median may be especially competitive.
We currently track this stone category across 10 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 $17,747 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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