3.5 Carat Cushion Lab Grown Diamond Prices Comparison
As of February 2026, 3.5 carat cushion lab grown diamonds usually range from $702 to $27,090, with an average price of $2,622.In the last month, prices for these diamonds are down 4%.Compare 884 verified listings across 13 retailers tracked by CaratRadar.
3.5 Carat Cushion Lab Grown Diamond Market Overview
CaratRadar currently tracks 884 verified 3.5-carat cushion lab grown diamonds listed across 13 online retailers. Prices in this segment range from $702 to $27,090, with an average asking price of $2,622 and a median of $1,699.
The price spread of $26,388 (97.4% 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.
884 diamonds tracked in this segment
Price range: $702 to $27,090
Average price: $2,622
Median price: $1,699
Available across 13 retailers
Savings potential: up to 97.4%
Price Range Overview
As of Feb 28, 2026Real market range for this carat, shape, and diamond type.
884
$702
$2,622
$1,699
$27,090
Price History
Price Comparison Matrix
Live Listings
See all listingsCompare current retailer offers for this exact segment and open any listing for full details.
GIASave 81.1%3.46ct | Cushion | D | VVS1 | Excellent
From $2,240
Compare at $11,880
IGISave 76.7%3.46ct | Cushion | D | VVS2 | Very Good
From $1,922
Compare at $8,260
IGISave 52.4%3.46ct | Cushion | G | VS1 | Ideal
From $12,730
Compare at $26,731
IGISave 89.1%3.46ct | Cushion | F | VS1 | Excellent
From $881
Compare at $8,110
IGISave 76%3.46ct | Cushion | E | VVS1 | Ideal
From $1,795
Compare at $7,470
IGISave 80.4%3.46ct | Cushion | F | VVS2 | Very Good
From $1,338
Compare at $6,829
IGISave 84.2%3.46ct | Cushion | E | VVS2 | Ideal
From $1,274
Compare at $8,070
IGISave 80.8%3.46ct | Cushion | E | VS1 | Very Good
From $1,663
Compare at $8,680
GIASave 79.3%3.46ct | Cushion | D | VVS1 | Excellent
From $2,195
Compare at $10,610
IGISave 75.6%3.46ct | Cushion | G | VVS2 | Very Good
From $1,638
Compare at $6,720
IGISave 49.1%3.46ct | Cushion | D | VVS1 | Very Good
From $3,238
Compare at $6,365
IGISave 26.8%3.46ct | Cushion | E | VS2 | Very Good
From $1,076
Compare at $1,471
IGISave 20.5%3.46ct | Cushion | E | VVS2 | Very Good
From $1,428
Compare at $1,797
IGISave 84.4%3.46ct | Cushion | E | VS1 | Ideal
From $1,211
Compare at $7,790
IGISave 76.7%3.46ct | Cushion | D | VVS1 | Ideal
From $1,962
Compare at $8,410
IGISave 65.5%3.46ct | Cushion | D | IF | Ideal
From $5,005
Compare at $14,510
IGISave 73.3%3.46ct | Cushion | E | VVS2 | Ideal
From $1,452
Compare at $5,440
IGISave 81.1%3.46ct | Cushion | D | IF | Very Good
From $3,917
Compare at $20,770
IGISave 52.8%3.46ct | Cushion | D | IF | Ideal
From $6,846
Compare at $14,510
IGISave 98.1%3.47ct | Cushion | H | VS1 | Excellent
From $1,285
Compare at $67,665
GCALSave 75.3%3.47ct | Cushion | D | IF | Excellent
From $6,435
Compare at $26,080
GIASave 80.8%3.47ct | Cushion | D | IF | Excellent
From $4,523
Compare at $23,600
GIASave 72.5%3.47ct | Cushion | D | VVS1 | Excellent
From $3,203
Compare at $11,650
IGISave 84.5%3.47ct | Cushion | F | VS1 | Very Good
From $1,242
Compare at $8,020
GIASave 81.4%3.47ct | Cushion | D | VVS1 | Excellent
From $2,171
Compare at $11,650
IGISave 76.8%3.47ct | Cushion | E | VVS2 | Very Good
From $1,196
Compare at $5,150
IGISave 32.4%3.47ct | Cushion | D | VVS2 | Good
From $2,834
Compare at $4,195
IGISave 63.2%3.47ct | Cushion | D | VVS1 | Very Good
From $4,110
Compare at $11,180
IGISave 75.1%3.47ct | Cushion | D | VVS2 | Ideal
From $2,704
Compare at $10,880
IGISave 88.8%3.47ct | Cushion | E | VVS2 | Ideal
From $1,015
Compare at $9,050
IGISave 82%3.47ct | Cushion | D | IF | Ideal
From $4,402
Compare at $24,520
GIASave 23.9%3.47ct | Cushion | D | FL | Ideal
From $23,670
Compare at $31,086
IGISave 51.7%3.47ct | Cushion | FANCY | VS1 | Excellent
From $3,794
Compare at $7,854
IGISave 80.8%3.47ct | Cushion | E | VS1 | Very Good
From $1,668
Compare at $8,700
3.48ct | Cushion | I | VS1 | Ideal
From $1,363
Compare at $8,270
GIASave 56.8%3.48ct | Cushion | D | IF | Excellent
From $12,130
Compare at $28,080
GIASave 79.3%3.48ct | Cushion | D | VVS1 | Excellent
From $2,206
Compare at $10,670
GIASave 62.6%3.48ct | Cushion | E | VVS2 | Excellent
From $2,309
Compare at $6,176
IGISave 63.5%3.48ct | Cushion | G | VVS2 | Ideal
From $1,559
Compare at $4,270
IGISave 75.2%3.48ct | Cushion | D | VVS1 | Good
From $2,814
Compare at $11,330
IGISave 73.4%3.48ct | Cushion | D | FL | Excellent
From $14,419
Compare at $54,190
GCALSave 76.9%3.48ct | Cushion | E | VVS2 | Excellent
From $1,805
Compare at $7,800
IGISave 71.4%3.48ct | Cushion | E | VVS1 | Ideal
From $2,915
Compare at $10,180
IGISave 81%3.48ct | Cushion | D | IF | Excellent
From $4,034
Compare at $21,210
IGISave 60.6%3.48ct | Cushion | D | VVS2 | Very Good
From $1,657
Compare at $4,210
IGISave 46.7%3.48ct | Cushion | G | VVS2 | Very Good
From $1,460
Compare at $2,740
IGISave 71.5%3.48ct | Cushion | E | VS1 | Very Good
From $2,490
Compare at $8,730
GIASave 75.5%3.48ct | Cushion | D | IF | Excellent
From $16,629
Compare at $67,950
GIA3.48ct | Cushion | H | VS1 | Ideal
From $3,220
Compare at $3,480
IGISave 72.4%3.48ct | Cushion | H | VS1 | Ideal
From $837
Compare at $3,030
Entry pricing in this category starts around $702.
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 $26,388 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 $1,699 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 884 comparable stones in this segment. Prices start around $702 and go up to $27,090.
Based on the latest market data, the average asking price is about $2,622 with a median around $1,699.
The observed spread is roughly $26,388 across tracked listings, which is about 97.4% 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 $1,699, 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 13 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 $26,388 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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